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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / August 2006O2 Sensor problem in 97 Geo Prizm
The check engine light came on in my 97 Geo Prizm. The code was P0141 (O2 Heater Circuit (Bank 1, Sensor 2)) and the Chilton manual said that that was the post-convertor O2 sensor. It had a little diagnostic test I could try and so I tried that out and according to the test it was bad. I replaced the sensor on Saturday, but then today on the way to work the check engine light came on. It was the exact same code. Does anyone have any suggestions on what the problem might be? Thanks, Dave Try lookinf for burnt/chaffed O2 wires, or loose connections..  Signaturecorning_d3 http://www.automotiveforums.com OBDII doesn't turn off the check engine light until the codes are cleared - take it to an Autozone and they'll check it and clear it for you. Signaturesilicon212 http://www.automotiveforums.com Ya, I cleared the code and it came back on after driving for about 40-50 miles. Dave > OBDII doesn't turn off the check engine light until the codes are > cleared - take it to an Autozone and they'll check it and clear it for [quoted text clipped - 7 lines] > > http://www.automotiveforums.com davejohansen@gmail.com Wrote: > The check engine light came on in my 97 Geo Prizm. The code was P0141 > (O2 Heater Circuit (Bank 1, Sensor 2)) and the Chilton manual said that [quoted text clipped - 5 lines] > Thanks, > Dave I assumed it was already off... Signaturecorning_d3 http://www.automotiveforums.com > The check engine light came on in my 97 Geo Prizm. The code was P0141 > (O2 Heater Circuit (Bank 1, Sensor 2)) and the Chilton manual said that [quoted text clipped - 5 lines] > Thanks, > Dave OBD-II codes only indicate a problem within a circuit, they don't isolate a bad sensor. It's very possible that the O2 sensor you deemed as being defective was okay. How did you test it? How many miles on the vehicle? Did you verify continuity from the ECM to the O2 sensor? At this point since you changed the sensor and it did not fix the problem it would seem to implicate a wiring problem. Burned or broken wires or a bad ground. Chris halatos@gmail.com Wrote: > > The check engine light came on in my 97 Geo Prizm. The code was P0141 > > (O2 Heater Circuit (Bank 1, Sensor 2)) and the Chilton manual said [quoted text clipped - 20 lines] > > Chris OFF TOPIC Chris are you the same Chris/Halatos that used to run Ancient Ruins BBS in AZ? Signaturesilicon212 http://www.automotiveforums.com The car has about 80,000 miles on it and I didn't verify continuity between the ECM and O2 Sensor before changing it. The Chilton manual said to make sure that there was 12 V making it to the O2 sensor (which there was) and to check the resistance of the sensor (which it said should be between 11 and 17 Ohms). The resistance was around 22 Ohms and so I assumed that it was bad, but I'll check the continuity from the ECM to the O2 sensor now. What's the easiest way to do that? Thanks, Dave > > The check engine light came on in my 97 Geo Prizm. The code was P0141 > > (O2 Heater Circuit (Bank 1, Sensor 2)) and the Chilton manual said that [quoted text clipped - 16 lines] > > Chris |
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