2004 F150 Rough Idle Check Engine Light

If rough through all RPMs, could be a vacuum leak. my buick seems to have developed a misfire out of nowhere. When the engine is started cold, regardless of the outside temperature, the idle is rough and there is a noticable power loss. 4 4V engine may exhibit a runs rough, lacks power, and engine misfire, prompted by a MIL light and DTC codes P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, and P0316. 4 liter engine have faulty spark plugs that break off in the head creating additional expense. "check engine soon " light on. Hey I have a 2000 prerunner v6. So my check engine light came on and the Jeep is running real rough. 4L V8 Haven't driven thru water. 2004 Ford F150 Rough Idle and Check Engine Light discussion on the TexAgs Automotive forum. 5 S40 Rough idle, flashing check engine light Help, Advice, Owners' Discussion and DIY Tutorials devoted to the second generation C70, S40 and V50 Volvos -- awkwardly model year 2004 ½ onwards -- plus where to go for advice and discussion on Volvo's sporty C30 Coupe powered by Volvo's ubiquitous inline 5-cylinder power plant. Does anyone know if the 2004 dakota injectors are different. If you own a 2004-12 Ford F150 or other truck with 5. I drove it out of the garage and was on my way to the gym thinking this would go away in a few minutes but after I pulled out of the garage the check. The first sign of the problem was the service engine light would blink intermittently when driving on the highway or revving the gas. You are here: Check Engine Light Home > Check Engine Light Codes (Generic Powertrain) Check Engine Light Codes. As of late this afternoon, the car won't start at all and the dreaded "Service Engine Soon" light is on. Check engine light and trouble code P0300 misfire. Rough, no power and the check engine light starts flashing. Hi, is there any campers that are knowledgeable on the ford v10 engine? mine has a kinda rough idle and I can't find anything wrong with it. It can be felt at a stop light idleing, some times the RPM needle will boune around a bit, and you can fell it if you were to lean on the truck. The most recently reported issues are listed below. The check engine light looks like a simple. Page 2- rough idle, blinking check engine light, need help! Rocky Mountains Impreza Club Forum -- RMIC rough idle and blinking check engine light as well as major. Sometimes idles rough, other times ok. The first sign of the problem was the service engine light would blink intermittently when driving on the highway or revving the gas. Unfortunately, as of turning the key when I got in this afternoon to drive home, the engine suddenly idles very rough, struggles at low RPM and the check engine light flashes non-stop. I took it to the parts store & had them read the code. Possible cylinder head or valve damage on the GM 2. Compression. Solution: Ignition coil replacement. At first I thought it may be a fuel filter issue but the problem clears. Will an 01 Xterra roof rack fit on a 98?. Sure enough it runs rough and has a MIL lamp on. My car has developed a rough idle. In the last couple months, I have noticed a rough idle sometimes but only in drive. i restarted it to see if it was any better, nope. I turned my car off and back on and it went away. 4i idle with the air conditioning OFF it settles into an idle around 500RPM. Occasionally will start with no problem. Rough Idle, Blinking Check Engine Light. Could this just be a bad fuel filter?. When I first installed it sometimes the truck would stall when I stopped and did not place it in park. Rough Idle, Flashing Engine Light, Strong Exhaust After driving a few minutesand stopping at a light, the engine light begins to flash and the engine idles very rough. I had to play with the throttle to get it to finally fire up, it sputtered a little bit then finally smooth out but it would not idle at all. The engine check light flashes and immediately the engine speed dies. ( misfire perhaps or spark plug wires). Rough Idle, No power, black smoke??? Started truck up from inside the house this AM 21 degrees outside. I started having a rough idle issue with my 2004 Chevrolet Silverado, 5. truck runs rough when it warms up 11 Answers. Your fuel trims can be a long way out of "normal" and still not set a check engine light. I taped the primer bulb in a almost vertical position and the engine will not even plane the boat it is running so bad, When i lay it down horizontal in the well it runs fine but will still stall at idle more often than not. Rough Idle, No power, black smoke??? Started truck up from inside the house this AM 21 degrees outside. If the engine starts to misfire and the vehicle is newer than 1996, then the check engine light may come on or flash and the computer may store a diagnostic trouble code like P0300 or something along those lines. 6 when cold it idles fine after warm up it has a rough idle just enough to notice and make you want to fix it it runs good no missing or lack of power so i pulled throttle body it was a mess cleaned it with tooth brush and sea foam deep creep to keep from messing up coating and no luck i hope someone here could lead me in the right direction on how to fix the idle problem thanks. Truck idling funny and does not get up and go, rough idle and sluggish. If the light does not come on during. Warning lights: engine under powered (in odometer window). will probably get a code for the cam sensor eventually. It's clean, but no luck, so I change to the old ignition coil pack and now it drives smooth but idles rough. Ford F-150 Engine Runs Rough at Idle - 167 reports. Q: Engine running rough - 2001 Ford F-150 YourMechanic has several available technicians that can assist you with a rough idle inspection Check Engine Light. If you own a 2004-12 Ford F150 or other truck with 5. It then jumps back up to about 750, but idles rough. 3 stock 51k This is second hand information because this always happens to the wife! She started the car after at the store and the idle was rough. Started driving am for about 5-7 miles and getting on an on ramp to freeway vehicle suddenly had no power and idle very rough/ could not accelerate and service engine light, hill assist not active and another. When i let my 2004 4. Dealer replaced Idle air control valve to the tune of $200. 2004 - 2008 F150 - Check Engine Light and Rough Idle=$1000 later - Went to work the other day driving my 05 F150 FX4 with no problems. Problem with my = 2004 Chevy Colorado. Notice 2: For your vehicle safety, We Only provide the Original OEM Brand New Key with UNCUT KEY, You need to find your local locksmith for cutting. or see if you have a code for a cylinder misfiring. Hi since i got my Mazda protege 2000 1. In other words, the actual idle speed varies from the target idle speed. So a while back my check engine light came on, but the car ran fine. When the truck is under load (going up a hill etc. hey guys, i have a 2002 ford explorer xlt 4. It had 5,700 miles on it at purchase, and now has 19,000. This is a good example of how basic engine diagnostic tests can work to pinpoint the root cause of the cars problem. drove right to the dealer who determined it was a bad throttle body. The light will come on when the ignition is first turned on and remain on briefly as a bulb check. How To Fix Rough Idle When Warm? Most likely, the causes of rough engine idle crops from the basic functional components like direct fuel injectors, PCV valve, EGR valve, Oxygen sensors, vacuum leaks, air filter, and spark plugs. Rough Idle, No power, black smoke??? Started truck up from inside the house this AM 21 degrees outside. I took it to the dealer, and they replaced my IAC. VTM light stays on and so does the check engine light I am heading to Autozone to take advantage of the free code reading as I have the factory MX Book 2004 Honda. No check engine light…no trembling…nothin!! Well, at least til now. A bad ignition coil usually means a rough-running engine and an illuminated check engine light. 8 liter V6) fell flat on acceleration. 4 4V engine may exhibit a runs rough, lacks power, and engine misfire, prompted by a MIL light and DTC codes P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, and P0316. I can hear the fuel pump in the auxilary position. Has gotten to most of the time won’t start, starter turns engine engages, but won’t turn over. 2004 Ford F150 Rough Idle and Check Engine Light discussion on the TexAgs Automotive forum. 4 rough idle It is a well known problem, not enough oil pressure to the timing chain tensioner. Idle seemed high and was a little "rough" like a misfire almost. i have a 07 f150 4. Sometimes idles rough, other times ok. Idle is irregular all the time (Rpm's up and down) and brakes are spongy (almost no brakes) on start-up. or where the leak is. How to Troubleshoot an Idle That Is Going Up and Down in an F-150 by Sameca Pandova A uneven idle on a F-150 can be a symptom of a variety of engine issues such as vacuum leaks, failed or dirty sensors or worn engine components. This company is not yet accredited. As of late this afternoon, the car won't start at all and the dreaded "Service Engine Soon" light is on. Replaced sensors (twice!). Average repair cost is $1,500 at 96,200 miles. I went out to lunch last week and no problem then left the parking lot and the car hesitated a little, check engine light blinked then went solid and from there on the engine vibrated really bad on low RPM and acceleration and has a rough idle. Check Engine Light Codes My F150 pick up truck has a bad rough idle and would surge/stall at times. when i put it in park or nuetral it idle up but it still lopes. Bad fuel filter, misfire, bad grounding wire misfiring on several cylinders depending on how bad it's shaking. Did a test and it came up code 3. 4L three-valve V8 engine and experience a rattling noise, rough idle, check engine light, the repair may not be as serious as you thought. If it still has a problem, replace the IAC. Not Bad At First But Now Its Bad. was able to drift over to the side of the road. It runs good otherwise and gets good gas mileage, and passes smog check. This past weekend I visited my folks and the car sat for a couple of days. 4l check engine light and fail safe on interior display. A check engine indicator is a malfunction-indicator light or MIL for the computer-management system. 16 problems related to check engine light on have been reported for the 2004 Ford F-150. If I then rev up the engine it smooths out but when still 'cold' returns to the rough idle. When I accelerate hard the service engine soon like will blink. 2009 Ford F-150 Engine problems & defects. The car throws and evap code every now and then but after a couple driving cycles it always went away. Check engine light back on. Average repair cost is $3,980 at 133,550 miles. 6 thoughts on " Running Rough?? Check engine light? No Problem!! " Brooks December 16, 2014 at 11:11 pm. Starter and battery easily turns the motor over. I have a 2004 F150 with Triton engine. Truck Has Rough Idle For About Three Weeks. Rough Idle and Check Engine Light. First my issue started when I started it up one day and it would not start (no check engine light). What would cause truck to shake and idle rough? Sent from my iPhone using Tapatalk. When I am sittting at a red light with it idling (650 rpm) in gear, the vibration of the engine makes the passenger side headrest vibrate badly. The VTM Light has come on. Check Engine Light. 5 cylinder engine. About 6 weeks ago it had this problem and we replaced the ignition coil pack and it ran fine until today. The check engine light came on again, and i have rough idle. It then jumps back up to about 750, but idles rough. Sometimes when I have driven the truck for a while (20+ mins) and come to a stoplight the engine starts to have a rough idle. EGR valve I had the same problem with my 2003 Odyssey at about 21000 miles-- the check engine light came on, the TCS light came on (and then went off again), and I got a relatively severe stuttering/shuddering at freeway speeds with light acceleration only, and it was the EGR valve-- now replaced with a cure for the van's ills. Then after a few minutes it goes away. Ford can't find the problem or get it to duplicate which is very surprising as it happens all the time. The check engine light looks like a simple. I drove it out of the garage and was on my way to the gym thinking this would go away in a few minutes but after I pulled out of the garage the check. ( misfire perhaps or spark plug wires). A rough engine idle or stalling is a common complaint, but in some cases can be difficult to resolve. Please also check out the statistics and reliability analysis of the 2004 Ford F-150 based on all problems reported for the 2004 F-150. In some cases you need to pull over immediately to prevent damage while in others you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light. 0 L and having a rough idle, flashing check engine light, and poor acceleration. It can be felt at a stop light idleing, some times the RPM needle will boune around a bit, and you can fell it if you were to lean on the truck. Runs better at higher RPMs but still has a problem. 4L Triton - rough idle and stall - IWE vacuum leak? - Hey everyone - this video is for all those people who think they've got a vacuum leak and aren't quite sure what to do about it. Select Data Logger 2005-2012 Expedition, Navigator and 2006-2008 Mark LT vehicles equipped with a 5. My check engine light came on about a week ago and i brought it to the parts store because they do the diagnostic test for free. Twice now I have had the CEL come on saying "Engine Fault Service Soon", car gets into a really rough idle but as soon as I turn it off and back on everything is fine. I figured it was just an O2 sensor and had planned on taking it in to check the codes. Im going to go the Autozone later and get the code, but I was wondering if you check engine light and rough idle - JeepForum. 2004 ford f150 5. The code P0505 - Idle Control System Malfunction means that the engine computer cannot regulate the idle speed. No codes, check engine light does not come on. '96 850 - Rough idle when transmission engaged It has been very well maintained and ran perfectly smooth until this morning. 2005 Mazda 3i Engine knocking when idle. 2009 - 2014 Ford F150 - Rough idle/chatter/shake 5. It is the light that we shouldn't ignore. A cold engine will experience a misfire that a warm engine will not notice except under a hard accelerate. i also have a problem with my truck on cold or rainy days my truck runs like crap but on hott days it runs great. The check engine light was on so I had the code (P0174) read at my local auto parts chain and the advice from the guy behind the counter was to start with the cheapest fix first. Brazil: Sao Bernardo Do Campo. 3L with 100K miles on it. If you are driving a 2009 Ford F-150, or if you are planning to purchase one, then it is important that you review reported Engine problems and defects. Suburban Car Forums She said that it seemed to be worse at idle than when accelerating. Ford Check Engine Light Codes. 5 S40 Rough idle, flashing check engine light Help, Advice, Owners' Discussion and DIY Tutorials devoted to the second generation C70, S40 and V50 Volvos -- awkwardly model year 2004 ½ onwards -- plus where to go for advice and discussion on Volvo's sporty C30 Coupe powered by Volvo's ubiquitous inline 5-cylinder power plant. I am by no means an auto expert and so this is an anecdote in search of some answers. No codes stored or anything which is very confusing. Welcome to the Ford Check Engine Light codes page. 2004 Camry SE v6 3. When I first installed it sometimes the truck would stall when I stopped and did not place it in park. i restarted it to see if it was any better, nope. 2009 Ford F-150 Engine problems & defects. The check engine light has come on twice, but went out on the next drive. I installed the predator 93 octane tune. Anyone who owns/drives one of these trucks is very likely to come across the dreaded P0171/P0174 service engine soon light. Turn on AC or shift car into drive, idle should remain steady or increase slightly. Rough Idle Caused by EGR Sensor Sticking on Ford F-150. 16 problems related to check engine light on have been reported for the 2004 Ford F-150. In fact it just had a recent tune up. My wifes 05 XC90 2. It could also be a warning of a serious problem that could damage your engine components. It runs smother at higher RPM but still lacks the same power as before this sudden change. The check engine light came on, and will occasionally start blinking 15-20 times, then stop at low speeds. Brazil: Sao Bernardo Do Campo. Anyone who owns/drives one of these trucks is very likely to come across the dreaded P0171/P0174 service engine soon light. WARNING: Cancer and Reproductive Harm - www. After it is started the engine is running very rough (like one cylinder is not firing) and the Check Engine Light comes on and blinks as does the cruise control. No check engine light…no trembling…nothin!! Well, at least til now. It had been driving fine all week. The customer complaint is that it runs rough and the check engine light is on. If the engine starts to misfire and the vehicle is newer than 1996, then the check engine light may come on or flash and the computer may store a diagnostic trouble code like P0300 or something along those lines. i have read that there was an update. I figured it was just an O2 sensor and had planned on taking it in to check the codes. If the engine will sit and idle; even if it’s rough, take anything unnecessary out of the way and start the engine. 2004 F150 Engine (5. 140000 miles. Finding the problem can be daunting, especially with so many sensors and switching valves involved. 6L Automatic My engine is stock. it was sitting for about one hour, then when i started it it had a rough idle, not undrivable but still noticable. The data is used to calculate air density and determine the engine's air mass flow rate, which in turn determines the required fuel metering for optimum combustion. Ran fine on the way into work this morning. Rough engine idle and under load with no check engine light Discussion in ' Stock 1995 - 2001 Explorers ' started by tylerparkersdad , January 21, 2010. I've got a 2009 F150 with the 5. rough idle while in gear 6 Answers. Porsche Cayenne 2004 4. Please help. Hi, is there any campers that are knowledgeable on the ford v10 engine? mine has a kinda rough idle and I can't find anything wrong with it. I turned my car off and back on and it went away. I have a 2004 F-150 with close to 138K, recently in 3/4 gear at 45-55 MPH when I barley step on the gas the engine hesitates and bucks, pretty rough sometimes. 2004 mercury gran marquis/rough idle/sputters Is the Check Engine Light on? One cause that comes to mind is those cars seep coolant from the heater hoses and fill. To diagnose many of the problems, you will need little more than a test light, a volt meter, a vacuum gauge and maybe a can of brake clean. Rough, Unstable, or Incorrect Idle and Stalling. If it smooths out at higher RPMs you might try an Idle Air Control Valve, but this usually causes the Check Engine light to come on. It has a loss of power and is hard to start off from a stop. The first question is, can an exhaust leak cause a rough idle? When you have a rough idle situation and it's being attributed to an exhaust leak, it is more likely that the reason for a rough idle caused the exhaust leak. 2004 - 2008 F150 - Check Engine Light and Rough Idle=$1000 later - Went to work the other day driving my 05 F150 FX4 with no problems. The engine still feels a tad rough on idle but nothing even close to how it was before, and it's much better on the highway. Dealer replaced Idle air control valve to the tune of $200. Cost: $300 to $500. The code definitions are a good starting point when determining the cause of the service engine light but where do you go from there?. 2004 F150 4. 2009 Ford F-150 Engine problems & defects. or see if you have a code for a cylinder misfiring. If it still has a problem, replace the IAC. Hello all! I’ve got a weird issue with my 2001 325ci and I’m wondering if anyone has an idea of what it might be… A few weeks ago, the engine randomly started running very rough at idle / low speed and I had about a quarter tank of gas left. f150: engine light came. Sometime it switches off when I try to apply the accelerator to increase the rpm. Check for faulty engine. F-150 Rough idle. Runs fine when accelerating. Funny thing is when, I turn the A/C on the rough idle stops. 2004 ford f150 5. If I rev it up it stops until I stop again of go into an idle. Overview If you've stumbled upon this site, you probably own a 2001-2004 Ford F150 with the 4. it also seems the longer i sit the worst it gets. Select PIDs VCTDC, VCTDC2, and CHT may exhibit an intermittent rattle noise/rough idle when engine is at operating temperature. Still had the CEL. Ford F150 2004 Models - Reported Issues 2004-2008 Ford F-150 Problem: Rough Idle. Runs fine when started. Sure enough it runs rough and has a MIL lamp on. Have you ever wondered what causes a car's check engine light to come on? Here, we list some of the most common mechanical and electrical problems that can trigger this important warning, and. it has all new plugs, plug wires, cap, and catalytic converter. Engine Stalls (Check Engine Light May or May Not Be On). I just filled it up today with a fresh tank of gas and reset my trip odometer to see if my mileage has improves. WK is running rough like it might stalland the check engine light flashes on and off for about 10 seconds, then goes off and. It normally should be a high idle when started cold and if it isn't doing that, that's a clue. Solution: EGR valve replacement. If you own a 2004-12 Ford F150 or other truck with 5. Wanted to know how many oxygen sensors there are and where they are located. 5-2004) Rough Idle, Check Engine Light. When I get there the car runs fine but the check engine light is on. Engine sounds rough when accelerating; When accelerating there's a ticking/clicking noise (similar to a card on the spokes of a bike; like what children do) Check Engine light: 'Bank 2 system too lean' When maintaining a steady speed it sounds completely fine. i have read that there was an update. P0506 FORD Tech Notes If there are no intake leaks, clean throttle body, adjust engine idle and erase engine code. To clear the confusion, we need a basic understanding of what the check engine light is trying to tell us. As I backed off the accelerator, it started to pick up smoothly but when I accelerated it started to miss and buck. I got where I was going and left it sitting for a few hours. I had that problem before and using a carburetor cleaning product on the admission fixed it for a long time, but now it happened again and I can't fix it. Once I was moving again the smell and roughness went away, but the light stayed on. While Driving The Vehicle Engine Lost All Power And When I Pulled Over To The Side Of The Road The Engine Died. If severe, the engine or vehicle may shake. Average repair cost is $3,980 at 133,550 miles. Rough idle, especially when hot Loss of power after hard accel; rough idle, "Check Engine" light on, DTC P1211 Rough idle--manual transmission; "Bearings in a can" rattle noise 96/97 stalling after a long decel/down grade Stall when engaging reverse or manual first gear--auto trans Surge/bucking and jerking at cruise. Wanted to know how many oxygen sensors there are and where they are located. Re: Ford F 150 2002 4. Flashing check engine light. starts but no throttle and rough idle. driving down the road it does fine, never sputters or struggles, but once i stop at a light it starts the rough idle. Thanks to the guy who I bought the truck from for installing the remote start. Now I found out t. I took it to my local mechanic and he pulled the codes. Sputtering at idle. Starter and battery easily turns the motor over. As of late this afternoon, the car won't start at all and the dreaded "Service Engine Soon" light is on. Upon arriving at one of my shops I am given a 2004 Ford F-150 5. This morning (again temps in the low 50s), rough idle of the same magnitude, backed out and put in drive, same bucking, check engine light this time and the rotten egg small again. - okay guys i need a little advice. FIX! 2004 F150 5. The problem has been on going for a couple months now. 6 Engine Rough idle Code bank 1and 2 lean Correction: pcv, not pvc This is a updated video from my channel Ondraj123 if its jurking going up hills and service engine comes on could be. You are here: Check Engine Light Home > Check Engine Light Codes (Generic Powertrain) Check Engine Light Codes. It isn't until i've been driving for about ten minutes or so until it starts idling roughly when stopped at a red light. Welcome to the Nissan Check Engine Light codes page. 5 S petrol had engine. Runs great but after it heats up and I stop at a light it starts to diesel and make all kinds of noise. Everyone else has the brass sensors already as GM/Saturn quietly figured this out before infecting the rest of the Saturn line. The truck has the check engine light on, but when I start it and accelerate it I get a wrench warning light and it starts failing and loses power, and the AC stops working. The vehicle lost power and the accelerator pedal did not respond. Knowing if we should continue driving or stop right now is difficult. The check engine light will NEVER come on telling you to do routine maintenance. starts but no throttle and rough idle. Rattling noise, rough idle, check engine light. I haven't gotten it anywhere yet to check the codes as it just started again this morning. Possible cylinder head or valve damage on the GM 2. I can hear the fuel pump in the auxilary position. ^^Searches ExplorerForum. 21 problems related to car stall have been reported for the 2004 Ford F-150. The check engine light came on again, and i have rough idle. It has a very rough idle (ie engine/car shakes violently on idle) and it doesn't seem to matter if the engine is cold or warm. Recently, the check engine light came on, then went away. No code was set, but she ran terribly, with no power, major misfires, and an occasional backfire. is your check engine light on? It sounds like you may have a miss. Shaking while driving. 4 16v with a KFU engine. 2004 Camry SE v6 3. ok i brought the car to chevy and since there is no check engine light they really couldnt find anything but they cleaned the throttle body and added cleaner stuff to the gas tank but still runs rough. That is not good for the car, for prolonged periods of time. Average repair cost is $3,980 at 133,550 miles. the engine light is on but not blinking. I took my vehicle in for a service engine light issue. For Sale 2004 Ford F150 XLT w/5. Ford F-150 5. The first question is, can an exhaust leak cause a rough idle? When you have a rough idle situation and it's being attributed to an exhaust leak, it is more likely that the reason for a rough idle caused the exhaust leak. When the engine is started cold, regardless of the outside temperature, the idle is rough and there is a noticable power loss. When coming to a stop the rpm drops to 500 and feels like it is going to stall. The check engine light was on so I had the code (P0174) read at my local auto parts chain and the advice from the guy behind the counter was to start with the cheapest fix first. 4L Power Stroke Diesel - VERY rough idle, check engine light - Just thought I would post whats going on with my 08 F350 6. To learn more, see. This has been over a two week period. The 2004 Ford F-150 has 6 problems reported for check engine light. 04 F-150 XLT 4x4 with the 4. Check Engine Light. Buy a 2010 Mazda 3 Engine Mount at discount prices. 6L Automatic My engine is stock. Funny thing is when, I turn the A/C on the rough idle stops. Rough idle 2006 4. Check engine light and rough idle I washed my car yesterday and went to start it this morning and I could immediately feel the shaking and vibration as the tach was idling between 1K and 600 rpm. The past month has been really Bad. It isn't until i've been driving for about ten minutes or so until it starts idling roughly when stopped at a red light. 2009 - 2014 Ford F150 - Rough idle/chatter/shake 5. I own a '98 626 2. Thanks to the guy who I bought the truck from for installing the remote start. Bad fuel filter, misfire, bad grounding wire misfiring on several cylinders depending on how bad it's shaking. It only happens when I'm off the gas completely and stopped I drive. i have a 07 f150 4. Rough Idle, Flashing Engine Light, Strong Exhaust After driving a few minutesand stopping at a light, the engine light begins to flash and the engine idles very rough. My engine started trembling and check engine light started flashing. view details; apr 07, 2016 - concord, nc - engine the #3 spark plug has blown free of the cylinder head. The check engine light has come on twice, but went out on the next drive. Porsche Cayenne 2004 4.