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Car Forum / Subaru Cars / August 2006Help with CEL P0136 on '02 Forester?
On my 2002 Forester, the CEL has been staying on, took it to Autozone they read out a P0136 error code, which is suppossedly a Rear Oxygen Sensor Circuit Malfunction - how difficult are these to replace? I'd like to save a few bux and do it myself if possible. I have also read some posts that seem to indicate the wiring to these sensors will sometimes go bad, throwing the error code. thanks for any help! > On my 2002 Forester, the CEL has been staying on, took it to Autozone > they read out a P0136 error code, which is suppossedly a Rear Oxygen > Sensor Circuit Malfunction - how difficult are these to replace? I'd > like to save a few bux and do it myself if possible. I have also read > some posts that seem to indicate the wiring to these sensors will > sometimes go bad, throwing the error code. thanks for any help! Did they clear the CEL and, if so, did it come back on very quickly? Carl  Signatureto reply, change ( .not) to ( .net) They cleared it earlier today and it hasn't come back on yet. > > On my 2002 Forester, the CEL has been staying on, took it to Autozone > > they read out a P0136 error code, which is suppossedly a Rear Oxygen [quoted text clipped - 6 lines] > > Carl > They cleared it earlier today and it hasn't come back on yet. > [quoted text clipped - 8 lines] >> >>Carl I would wait to see if it returns. A cut wire might return immediately, a slow or 'lazy sensor' might come back in a few weeks. It MAY not come back at all. Usually, as for wear, the front sensor goes first - more heat and un-'catalyzed' combustion products hit it first. How many miles on your car? Carl Signatureto reply, change ( .not) to ( .net) Carl, 100,000 miles - So this is the rear sensor ...after the catalytic conv? - the guy at Autozone said it was the sensor before the CC. But the error code indicates Bank I Sensor 2... so it sounds like its definately AFTER the CC. Maybe I'll just wait and see if it comes back. The CEL has been coming on occasionally lately but then would go off by itself. Not sure if this is all connected. I thought perhaps the gas cap wasn't sealing as it didn't seem to be pressurizing the tank lately. No "woosh" of escaping air when you open the cap. > I would wait to see if it returns. A cut wire might return immediately, > a slow or 'lazy sensor' might come back in a few weeks. It MAY not come [quoted text clipped - 3 lines] > > Carl > Carl, 100,000 miles - > [quoted text clipped - 14 lines] >> >>Carl All 4 cylinders will show as 'bank one' (1/2 V8) even if they are not inline. Your car MAY have 3 sensors - anyone? - anyways, I's be very tempted to confirm which sensor if possible - sounds like it is getting 'lazy' - you can actually see them 'switch' on an o'scope and maybe some analog voltmeters - google 'lamda sensor' or 'oxygen sensor' . Do not use a voltmeter on them! It is either useless or damaging IIRC. you might post the code and conditions at www.usmb.net for more input, but I think you are just getting to point of needing a sensor. Just need to confirm which one. The AZ guy probably got the correct code number - but it may mean something 'slightly' different depending on the year model,etc. just my $0.02 Carl Signatureto reply, change ( .not) to ( .net) |
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