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2005 Chrysler PT Cruiser Base 4dr Wagon

2005 Chrysler PT Cruiser
Trim Info:
Front Wheel Drive, Small Wagon, Sport Utility Vehicle
22 mpg city / 29 mpg hwy
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April 2, 2013, 6:34 am

Liz H

Question: Check Engine function

My car is running very badly. But my check engine light has not turned on to alert of a problem, but theres is something wrong with my car. I had my car repaired over 3 years ago when the light came on. I paid the mechanic to reset, and turn the light off. My question is: Is it possible the mechanic disabled my computer, making it so my light wold not come on if there is a problem?

April 7, 2013, 8:25 am

Ron W
Expert Mechanic

Probably not.

A quick check to see if the light works is to begin with the car off. Turn the key to the on position. The light should come on. When you start the car, the light should go off within 10 seconds. If it does that, the bulb is good and the computer is doing its self test.

As to the poor running, there are many things that can make it run badly without turning on the light.

For all hard starting or engine performance issues, you should always start with the basics. Make sure the tune up items are done and check the charging and starting systems. The engine must have the basics done in order for it to be able to run correctly. Many things can cause this type of problem, and the simplest sometimes get overlooked.

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