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| Cavalier Problem Diagnosis Got a problem you can't fix? We can help. |
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#1
11-12-2009, 09:39 AM
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02 Sensor Heater Circuit Malfunction ????
my check engine light came on, so i ran the scanner on it and it came up with
P0141 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2) what does this mean? is it bad? how do i fix it?  i have a 1998 Z24 
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#2
11-12-2009, 04:36 PM
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Re: 02 Sensor Heater Circuit Malfunction ????
That means that there is a problem with the heater circuit for the post-cat O2 sensor. Check at the connector with the car running, it should have battery voltage across two of the terminals... can't think of the colors. Anyway, if you have power and ground there for the heater circuit, then the O2 sensor is bad.
__________________
'04 Cavalier coupe M/T 2.2 Ecotec Supercharged 14 PSI boost, charge air cooler, 42# injectors Tuned with HP Tuners Poly engine/trans/control arm bushings Self built and self programmed progressive methanol injection system
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#3
11-13-2009, 11:14 AM
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Re: 02 Sensor Heater Circuit Malfunction ????
yep, pretty much what he just said
the front sensor is on your exhaust manifold so it has no problems getting up to temperature. the one downstream past your catalytic converter is much farther away and takes alot longer to heat up to temp. thats why it has its own heater on it, to speed up this process. the heater on your sensor is not working. either cuz its not getting power because of a bad connection, or the heater/sensor itself is bad...
__________________
2001 Grand Prix GT: cat/u-bend/resonator delete, zzp PLOG, Custom Intake, DHP PCM, 1981 Fairmont 6cyl 3 speed 1978 Ford Ranchero GT 302 with a few goodies
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