Question about 2004 Jeep Grand Cherokee

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Engine light on, when put on diagnostics it showed system error and was reset by mechanic. now 2 weeks later light back on. Any suggestions

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What P code is it?

Posted on Jul 01, 2009

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Posted on Jan 02, 2017

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change mechanics --or bring back and have them fix correctly when they did the engine work doesnt sound like was done correctly and now you may have a bigger problem

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Don't start replacing parts in the hope that it cures the problem - it usually doesn't.

Give a mobile mechanic a call. It's worth paying for a professional opinion. A mechanic (or workshop) will be able to do a diagnostic test for you and identify the fault.

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How to reset engine light chevrolet traverse 2011


The check engine light arises when ECU finds any fault in the vehicle. Check for error code using On- Board Diagnostic system and then repair the codes.

Have a professional reset by on board diagnostic: You can tell any professional mechanic who have on board diagnostic system to reset the check engine light. The mechanic would not charge you with any penny.

If you do not want to try any of the above method then try hard resetting the check engine light; for hard resetting, follow the steps below:

1. Remove the battery terminals

2. Switch on the lights and press the horn for few minutes until last bit of electricity is drained.

3. When the horn stops working, you can now connect the battery again.

Jun 26, 2013 | Cars & Trucks

1 Answer

ENGINE light on, diagnostics test said gas cap was problem, I changed it, light went off came back on a couple weeks later, suggestions?


If an evap leak code is still setting, the next step would be to have someone pressurize the system with a smoke tester to determine where the leak is.

Mar 31, 2012 | 2005 GMC Jimmy

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My 03 colt check engine light came on mechanic ran diagnostics no errors or problems found light reset then back on a week later any ideas?


This is the problem your mechanic is going by code,code just point you in the direction , Its data, whats the fuel trim? Whats the freeze frame data? These are what you need,The CK ENG LT,looks at rationality,logic,open shorts and ground.You can have a 02 code,but the 02 is responding to the engine,Its data that the mechanic needs to know.

Mar 08, 2012 | Cars & Trucks

1 Answer

The check engine light recently came on in my 2004 Honda Civic and the car proceeded to lose power and shut off repeatedly. After running the diagnostic it indicated that the crankshaft sensor needed to...


Check engine light means emissions control system failure.
I would only rely on Honda to properly diagnose this and
replace component failure with Honda part. The ck engine
light was probably reset when your mechanic replaced the
crankshaft sensor, and in time, came back on cause the
problem has not been corrected.

Jan 21, 2011 | 2004 Honda Civic

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Both the engine lights and the VSC warning light appeared on the dash simultaneoulsy this evening while driving - what might this be?


Had this happen to my '05 Vibe (Matrix evil clone) recently. Mechanic read & reset codes. The non-flashing Engine light showed 2 large emission leaks. The VSC could be any number of things. He said hopefully it was a false positive on the VSC... potentially expensive to fix. Lights stayed off for a couple weeks & are now back on. I'm planning on seeing him later today. Also, said stability light stayed off, it is still working. fwiw...

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1 Answer

Check engine light has been on for 2 years...have


The EVAP System has a leak and needs to be repaired.
Obviously your mechanic,has not kept up with todays vehicles. EVAP issues are common. I would get a new mechanic, and make sure they have an EVAP Smoke Machine,otherwise their wasting their time and yours.
Also,if your the type of person who rides around 2 years with a check light on,you don't have much interest in what you drive.
I would guess you got at least one other drivabilty issue.
Pull the codes,and have your NEW Mechanic repair properly and SOON

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