Q: What would make my check engine light come on this much?

asked by on

I am at the end of my rope with my 2011 Jeep Grand Cherokee that always seems to have the Check Engine light lit up on the dashboard. For one reason another, with or without other symptoms, the light comes on often. I have had it serviced and reset 4 times now in the 39,000 miles I have driven it. This is not acceptable! Is my car a lemon?

Without specific information about your engine size and which engine codes have previously been reset, it is difficult to thoroughly diagnose the problem.

Using the 3.6L engine as a reference, I found that this engine may have issues with random misfiring, caused by possible cylinder leakage on the left cylinder head, that can cause the check engine to illuminate with or without symptoms.

Technical Service Bulletin (TSB) 09-002-14 dated December 15, 2014 specifies engine codes P0300, P0302, P0304, and P0306 as indicators of this issue.

If these codes appear during testing, I recommend calling your dealer because this TSB may include an extension of your warranty coverage for the test and repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. What would make my check engine light come on this much?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Trouble with security system

Depending on whether or not the security system is aftermarket or not makes a great deal of difference when dealing with these issues. An aftermarket system comes with the chance that it was not installed correctly. As well as the...

Q: Car rough idles sputters and jumps rpm after changing ignition coil cap and rotor.

Check the spark plug wires on the distributor and on the engine. It seems that you have one or more wires crossed and the engine is firing on the wrong stoke causing the engine to run rough and make the...

Q: Check Engine light on

If the Check Engine light came on in relation to the fuel cap being replaced, then that means it may not be a fuel cap related problem. I would recommend having the vehicle scanned for trouble codes by a knowledgable...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.