O2 Sensor problem
in [Toyota]
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From: davejohansen@gmail.com on 29 Aug 2006 21:54 The check engine light came on in my 97 Geo Prizm (almost identical to a 97 Toyota Corolla). 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
From: Ray O on 30 Aug 2006 00:50 <davejohansen(a)gmail.com> wrote in message news:1156902858.195011.174310(a)p79g2000cwp.googlegroups.com... > The check engine light came on in my 97 Geo Prizm (almost identical to > a 97 Toyota Corolla). 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 > If you used an aftermarket O2 sensor, the problem may be with the sensor, especially if you had to snip and join wires. I would do the same check on the replacement sensor to see if it checks good or bad. Keep in mind that you are checking the heater circuit and not the O2 sensor operation. If the O2 sensor heater check out OK, check the heater circuit wires back to the ECU for an open or short. -- Ray O (correct punctuation to reply)
From: davejohansen@gmail.com on 30 Aug 2006 09:52 Ya, the sensor I used was a "universal O2 sensor" that I had to snip and join to the existing plug. I'll do the same check and I'll look for a problem in the wiring. Thanks, Dave Ray O wrote: > <davejohansen(a)gmail.com> wrote in message > news:1156902858.195011.174310(a)p79g2000cwp.googlegroups.com... > > The check engine light came on in my 97 Geo Prizm (almost identical to > > a 97 Toyota Corolla). 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 > > > > If you used an aftermarket O2 sensor, the problem may be with the sensor, > especially if you had to snip and join wires. > > I would do the same check on the replacement sensor to see if it checks good > or bad. Keep in mind that you are checking the heater circuit and not the > O2 sensor operation. If the O2 sensor heater check out OK, check the heater > circuit wires back to the ECU for an open or short. > -- > > Ray O > (correct punctuation to reply)
From: Ray O on 30 Aug 2006 11:16 <davejohansen(a)gmail.com> wrote in message news:1156945943.366643.27610(a)74g2000cwt.googlegroups.com... > Ya, the sensor I used was a "universal O2 sensor" that I had to snip > and join to the existing plug. I'll do the same check and I'll look for > a problem in the wiring. > Thanks, > Dave > > Ray O wrote: >> <davejohansen(a)gmail.com> wrote in message >> news:1156902858.195011.174310(a)p79g2000cwp.googlegroups.com... >> > The check engine light came on in my 97 Geo Prizm (almost identical to >> > a 97 Toyota Corolla). 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 >> > >> >> If you used an aftermarket O2 sensor, the problem may be with the sensor, >> especially if you had to snip and join wires. >> >> I would do the same check on the replacement sensor to see if it checks >> good >> or bad. Keep in mind that you are checking the heater circuit and not >> the >> O2 sensor operation. If the O2 sensor heater check out OK, check the >> heater >> circuit wires back to the ECU for an open or short. >> -- >> >> Ray O >> (correct punctuation to reply) >
From: Ray O on 30 Aug 2006 11:19 <davejohansen(a)gmail.com> wrote in message news:1156945943.366643.27610(a)74g2000cwt.googlegroups.com... > Ya, the sensor I used was a "universal O2 sensor" that I had to snip > and join to the existing plug. I'll do the same check and I'll look for > a problem in the wiring. > Thanks, > Dave The need to snip and splice is one of the big reasons I am not a fan of aftermarket O2 sensors. They live in a pretty harsh environment, exposed to exhaust heat as well as road debris, water, snow, etc. The factory connectors are designed for this environment, while many DIY splices become the weak link. IMO, the extra cost of a factory O2 sensor is worth the reliability and with a known longevity. Let us know how you make out! -- Ray O (correct punctuation to reply) > > Ray O wrote: >> <davejohansen(a)gmail.com> wrote in message >> news:1156902858.195011.174310(a)p79g2000cwp.googlegroups.com... >> > The check engine light came on in my 97 Geo Prizm (almost identical to >> > a 97 Toyota Corolla). 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 >> > >> >> If you used an aftermarket O2 sensor, the problem may be with the sensor, >> especially if you had to snip and join wires. >> >> I would do the same check on the replacement sensor to see if it checks >> good >> or bad. Keep in mind that you are checking the heater circuit and not >> the >> O2 sensor operation. If the O2 sensor heater check out OK, check the >> heater >> circuit wires back to the ECU for an open or short. >> -- >> >> Ray O >> (correct punctuation to reply) >
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