SERVICE ENGINE LIGHT WILL NOT ILLUMINATE WHEN ...

1998 Chevrolet Blazer

Tiny

Anonymous

February, 17, 2013 AT 1:35 PM

Service engine light will not illuminate when ignition is turned on for first start up. Has an O2 sensor bad also which should have it on. Have checked cluster and is good as led works. Checked wire from computer and is good also for continuity. Tried a used computer same thing. Any idea? If answer resolves my problem we can negotiate a fair contribution.

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1 Answer

Tiny

ASEMaster6371

February, 17, 2013 AT 2:46 PM

Check all fuses for power to the pcm. Use a test light and check all fuses.

How do you know it needs a o2 sensor?

Never use a used pcm as it wont work. It is programed for another vehivle and will come up with vin mis match

Roy

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