O2 sensor replacement

Ixon · 12 Jul 2011 at 04:46

The otherday my EML came on with a fault code of P0135 Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

I reset the code and it hasn't come on since, so might have just been a glitch, due to carbon build up or something.

But just to make sure Im about to order a new o2 sensor, but what i want to know is are all o2 sensors on the car the same or are they diffrent depending on which one you replace.

Kei · 12 Jul 2011 at 11:22

Certainly for my car they have different part numbers. (pre and post catalyst) Whether this is due to actual sensor differences or just the cable lengths i don't know. You'd be best off checking with the supplier or a dealership to make sure.

Firestar_3x · 12 Jul 2011 at 11:25

Once sensor might be Wideband and the other Narrowband, so i'd check which is gone and get the proper part number.

GeX · 12 Jul 2011 at 13:35

it's down to cable lengths. Don't bother replacing it if the fault doesn't come back, especially considering the fault was in the heating circuit - not that sensing part of it.

Ixon · 12 Jul 2011 at 15:46

Well i've already bought one today didn't cost all that much, just over £30 & went ahead and replaced it.

It proberly need replacing at some point anyroads not to long down the line.

Matt82 · 12 Jul 2011 at 15:56

GeX said:
it's down to cable lengths. Don't bother replacing it if the fault doesn't come back, especially considering the fault was in the heating circuit - not that sensing part of it.

the sensor can still sense and be reporting badly without throwing a code so really hed have to investigate it further