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Random CEL, bad O2 sensors?

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Old 01-28-09, 08:03 PM
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shajbot
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Default Random CEL, bad O2 sensors?
What are some thoughts on this?
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Old 01-28-09, 08:21 PM
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dAng_bAy
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if it's random, probably bad gas. if it comes on after 2 drives cycles and stays light every time you reset the ecu, check the codes. if the codes for 2 heated oxygen sensors, check or replace your plugs.
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Old 01-28-09, 09:06 PM
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what do u mean by random? does it flicker or disappears afetr a while? try to get the code, otherwise there's no telling. probably a loose connector or bad ground...
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Old 01-28-09, 11:22 PM
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Originally Posted by dAng_bAy
if it's random, probably bad gas. if it comes on after 2 drives cycles and stays light every time you reset the ecu, check the codes. if the codes for 2 heated oxygen sensors, check or replace your plugs.
I always pump 91 from Sams Club, I think they sell reliably "good" gas.

Originally Posted by madmax98
what do u mean by random? does it flicker or disappears afetr a while? try to get the code, otherwise there's no telling. probably a loose connector or bad ground...
CEL comes on randomly and resets when I restart the engine.

One thing though, it does tend to come on when I cruise at relatively same speed (no cruise control).

Timing belt, spark plugs just got replaced, though this started happened way before I have these maintenance done.
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Old 01-29-09, 01:29 AM
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when it happens read the code, that's gonna be your best bet to solve this quickly and easily...
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