Question

I have the engine codes P0134 and P0135 on my Isuzu, how can't I locate the sensor?

Answer 1

Hi there,

Both of these codes point to a problem with the bank 1 O2 sensor, sensor #1. This is the first sensor BEFORE the catalytic converter. Without knowing the vehicle or engine size, can't tell you which side of the engine it's on. These codes are normally the result of a bad O2 sensor.