What are causes for check engine light to come on?

Tiny
TXVDW
  • MEMBER
  • 2004 VOLVO S60
  • 120,000 MILES
Had timing belt and catalytic converter replaced last year; car seems to be driving fine

light came on while on while long drive - just before hitting 120,000 miles.
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Monday, December 12th, 2011 AT 8:28 PM

2 Replies

Tiny
SATURNTECH9
  • MEMBER
There are too many to list you need to get the car scanned for codes and give me the exact code numbers not code descriptions.
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Monday, December 12th, 2011 AT 8:33 PM
Tiny
WRENCHER1
  • MEMBER
The "check engine" light is an indicator for a system that monitors many electronic functions in the system, also called the "malfunction indicator lamp" (MIL). It can come on for any of hundreds of different causes from any of the systems that the computer monitors. Some are very important and can lead to further component or engine damage and some are emissions related not as serious but still a problem and need to be repaired.

Your first step is to have the computer scanned to retrieve the trouble codes that were set when the check engine light came on. Those codes will give you specific information about what the computer saw and will get you pointed in the right direction to find your problem. With a 1996 or newer and some 95 cars and you have an AutoZone or Advanced auto parts in your area, they will read them for free. Once you have these code numbers, we can be a lot more specific about what your problem may be.
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Monday, December 12th, 2011 AT 8:50 PM

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