White chalk on upstream O2 sensor
08-05-2012, 11:46 AM
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White chalk on upstream O2 sensor
I have code P0420. i replaced manifold/cat. code is still there.
upstream o2 completely covered in while chalk stuff (silicone contamination)
i have ordered new up and down o2 but how do i know if this will fix the problem?
is there another problem causing the contamination causing my sensor to fail or did my sensor fail and the residue is from running rich?
I dont recall using any kind of silicone gasket stuff on my car.
I've only ever added a little coolant into the reservoir over say 80k miles.
upstream o2 completely covered in while chalk stuff (silicone contamination)
i have ordered new up and down o2 but how do i know if this will fix the problem?
is there another problem causing the contamination causing my sensor to fail or did my sensor fail and the residue is from running rich?
I dont recall using any kind of silicone gasket stuff on my car.
I've only ever added a little coolant into the reservoir over say 80k miles.
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08-05-2012, 03:07 PM
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Re: White chalk on upstream O2 sensor
when i replaced my org manifold/cat the cel went away on it's own soon after i installed the replacement. just fyi
i'll reset the ecu tomorrow. i dont have my tools
i'll reset the ecu tomorrow. i dont have my tools
08-08-2012, 08:33 PM
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Re: White chalk on upstream O2 sensor
ok, replaced the upstream o2 and reset ecu. drove not even 3 miles and P1381 popped up.
did some freeway miles. stopped, shut off, restarted back on freeway, refueled, back on freeway. P1381 popped up again after i got off freeway. i felt the engine dip/struggle for a sec and P1381 popped up. parked and i died at idle. started and died started and died. started and gave it gas and she idled. i can also see my gas needle dropping way fast. i'll calculate my mpg tomorrow i can already tell its going to be low.
did some freeway miles. stopped, shut off, restarted back on freeway, refueled, back on freeway. P1381 popped up again after i got off freeway. i felt the engine dip/struggle for a sec and P1381 popped up. parked and i died at idle. started and died started and died. started and gave it gas and she idled. i can also see my gas needle dropping way fast. i'll calculate my mpg tomorrow i can already tell its going to be low.
08-09-2012, 06:19 AM
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Re: White chalk on upstream O2 sensor
i've cleared it and i'ts come back 3 or 4 times. i did some reading in the forums and thought if it runs fine i'll just live with it but i did notice the last time the engine dip/struggle for a sec then the cel came with that code so something is up.
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