2002 c 230 check engine light and srs light - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 07-31-2008, 08:13 PM Thread Starter
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2002 c 230 check engine light and srs light

does anyon eknow the most typical cause of the check engine light om a c 230 year 2002 about 100,500 miles on it.. just came on...also the srs light has been on a while.

It only comes on when I use the driver side seat belt... when the passenger is belted and driver is not.. it stays off... as soon as the driver side is inserted it comes on.. any suggestions for an inexpensive fix on this?
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post #2 of 5 (permalink) Old 08-03-2008, 10:48 AM
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Get the codes read. Autozone or Advance Auto will do it for free.

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post #3 of 5 (permalink) Old 08-03-2008, 11:05 AM
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Originally Posted by upstaterider2003 View Post
does anyon eknow the most typical cause of the check engine light om a c 230 year 2002 about 100,500 miles on it.. just came on...also the srs light has been on a while.

It only comes on when I use the driver side seat belt... when the passenger is belted and driver is not.. it stays off... as soon as the driver side is inserted it comes on.. any suggestions for an inexpensive fix on this?
first you must obtain the fault codes.
Common problems:
the cam adjustment solenoids can leak engine oil. the oil then wicks its way into the engine wiring harness giving you fault codes for 02 sensors, maf, or sometimes even a code for faulty engine control unit. Inspect the solenoid and engine electrical connectors for oil.

a faulty seat belt buckle with give you a SRS fault.
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post #4 of 5 (permalink) Old 08-03-2008, 11:47 PM
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At that mileage it's quite typical to see O2 sensors fail.

You're wasting your time without a code scanner though.
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post #5 of 5 (permalink) Old 08-04-2008, 08:35 AM
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Harbor Freight had one on sale for $40 or so not too long ago.

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