Exhaust 99 V6, P0135 Code

austin3749 · Mar 14, 2019

I have an engine code for P0135. Sensor 1, Bank 1. I know that sensor 1 is upstream/front, but which side is Sensor 1? I’m not entirely sure. I ordered a new O2 sensor from AM to replace it. And also, is it before or on the catalytic converter?

Thanks for any answers. I definitely want to get to the point where I’ll work on my car a lot more.

wmburns · Mar 14, 2019

bank x sensor y

For a Ford bank 1 is on the right side (from the car's point of view). Bank 2 on the driver's side.

Sensor 1 is before cat. Sensor 2 is after cat.

Soooooooooo bank 1 sensor 1 is right hand side before cat.

Note, when ever a "circuit Malfunction" is called out it usually means that something is so wrong with the circuit that the PCM is unable to perform any real diagnostics. Think:

connector problem. dirty pushed corroded pins.
wiring problem
blown fuse.
serious bad O2 sensor.

P0135 - HO2S Sensor Circuit Malfunction (HO2S-11)

Short to VPWR in harness or HO2S.
Water in harness connector.
Open VPWR circuit.
Open GND circuit.
Low battery voltage.
Corrosion or poor mating terminals and wiring
Damaged HO2S heater.
Damaged PCM.

austin3749 · Mar 14, 2019

wmburns said:
bank x sensor y

For a Ford bank 1 is on the right side (from the car's point of view). Bank 2 on the driver's side.

Sensor 1 is before cat. Sensor 2 is after cat.

Soooooooooo bank 1 sensor 1 is right hand side before cat.

Note, when ever a "circuit Malfunction" is called out it usually means that something is so wrong with the circuit that the PCM is unable to perform any real diagnostics. Think:

connector problem. dirty pushed corroded pins.

wiring problem

blown fuse.

serious bad O2 sensor.

P0135 - HO2S Sensor Circuit Malfunction (HO2S-11)

Short to VPWR in harness or HO2S.

Water in harness connector.

Open VPWR circuit.

Open GND circuit.

Low battery voltage.

Corrosion or poor mating terminals and wiring

Damaged HO2S heater.

Damaged PCM.

Alright, that sounds good, or at least good to know. In most cases, I would assume replacing the sensor entirely would solve the issue unless it was due to water in the harness or a fuse issue, correct? The sensor I ordered from AM requires reusing the harness and all so I guess I have to cut some wires. Hopefully it isn’t much for me, I got an aftermarket radio working with the wires so hopefully this works.

Exhaust 99 V6, P0135 Code

austin3749

Member

wmburns

austin3749

Member

Similar threads

Exhaust 99 V6, P0135 Code

austin3749

Member

wmburns

austin3749

Member

Similar threads

Privacy & Transparency

Privacy & Transparency