Mechanics

CHEVROLET TRUCK CHECK ENGINE LIGHT PROBLEM

1990 Chevrolet Truck • 80,000 miles

I replaced the o2 sensor in my chevy truck; the check engine light went off for a week, now it's back on and is sucking up the gas.
here is the real problem: when the check engine light is on it runs great !
when the light goes out it becomes sluggish but will still run.

i purchased and had the auto repair guy use the code reader from my truck so this is how I know it's the o2 sensor.

now the parking light won't go out-HELLP !

thanks

what can I look for to remendy this problem?
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Guest
April 2, 2013.




What was the code? Codes never idnetify bad parts, just failed systems

Roy



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