P0135 O2 Sensor Heater Circuit Malfunction - Toyota Nation Forum : Toyota Car and Truck Forums


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Old 04-25-2007, 03:26 AM   #1 (permalink)
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Question P0135 O2 Sensor Heater Circuit Malfunction

I have a 2000 model LC, it came up with the check engine light and traction and skid control off.
After running a scan on the LC I got the following error codes:

P0121 Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem
P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

Does anyone know how to fix these?

The P0135 error code came on first, then followed by P0121 and P0155 after about 35miles.
Any help will be appreciated.
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Old 08-09-2008, 07:59 AM   #2 (permalink)
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I just got the same p0135 error...what did you do????
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Old 08-09-2008, 11:43 AM   #3 (permalink)
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The code is related to the sensor outlined in the post above yours.

Bank 1, Sensor 1 is the cylinder head nearest the firewall, Sensor 1 is the first sensor on the exhaust manifold (exhaust system).
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Old 10-28-2008, 12:16 AM   #4 (permalink)
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New oem o2 sensor, same code

I am now on my third freakin sensor to solve the CEL PO0135 code. First I used a universal o2 sensor, that did not fix it, so I just drove the truck for a year anyway. I then bit the bullet and purchased a brand new Toyota OEM sensor and I am still getting the PO0135 Code, o2 sensor Heater Circuit Malfunction (Bank 1 Sensor 1).

Does anyone have any idea what is going on here?

2000 Tundra v-8 engine 86,000 miles

Last edited by SCoupe; 10-28-2008 at 12:19 AM.
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Old 10-28-2008, 12:26 AM   #5 (permalink)
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Which sensor did you replace?

N.E.O.
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Old 10-28-2008, 12:31 AM   #6 (permalink)
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Passenger side, pre-cat, near the exhaust manifold with the bonus total PITA connection plug way too high on the auto tranny housing.
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Old 10-28-2008, 12:32 AM   #7 (permalink)
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That is Bank 2 sensor 1, Bank 1 is the left bank.

N.E.O.
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Old 10-28-2008, 12:40 AM   #8 (permalink)
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That then would be the best news I could hope for. I will swape the old one to the other side. Thankfully I still have the good one that I incorrectly pulled. If this proves out I will have to acknowledge that I am a pitifully uninformed weekend mechanic and that I wasted an enormous amount of time, energy an money on failed replacement of a perfectly good part, wasted money on two smog checks and more time than I want to admit. I am pissed, but I do thank you for pointing me to the other side of the truck.

EDIT: Huge and proper recognition to member "new echo owner". The advice was bullseye accurate and the freaking CEL issue that has vexed me for ~2yrs was solved in 10 minutes. I was doing the right thing on the wrong side of the engine. The sensor on the Bank 2 is quick and easy using the proper tool (o2 sensor socket). The harness disconnect is quick and easy. Thanks again !

Last edited by SCoupe; 10-29-2008 at 12:57 AM.
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Old 10-28-2008, 12:51 AM   #9 (permalink)
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Toyota did pull one on a lot of people, on the V6 Bank 1 is the right side; when they went to the V8 they had switched it around.

N.E.O.
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Old 08-17-2009, 12:21 PM   #10 (permalink)
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Where does one get the part and does anyone have any pics of what I am looking for. I too am getting the p0135 error code.

I have done this on a 4runner in the past, but it's different sensor design I think because it could just be cleaned with electronics cleaner.

Thx,
RickC
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Old 06-28-2011, 04:27 AM   #11 (permalink)
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the engeen error light shows and P0135 O2 sensor Bank1 is the error code. My car is Toyota Avansis with engeen 1ZZ-FE - Denso -MT.
Can any one tell me how to fix this error?
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