O2 sensor question / ecu voltage
 

The O2 sensor produces a waveform, which can be read at the jack in the engine bay. Question is should you see the same waveform at the signal pin on the ecu or a constant voltage?

waveform at the ecu.

Rob

Cheers Rob, my old O2 was shot, she was reading a constant 0.7 at the ecu.

Simon, how are you measuring it. Do you use a normal voltmeter? Do you open up the ECU and make contact with the pin, or read it off the wire or what???

I use a standard DVM on the connector block. The probe then contacts the connector.

Are you checking ground on the sensor too or are you using the engine block?

Stefan

the chassis

Ta.