Voltage to the Pre Cat Lambda

neilr

New Member
Hi All,

trying to bottom out a potential bias voltage problem to the Pre Cat lambda sensor.

I have 1.4 BBY engine and getting 10.4 volts through pin 5 (Vs+) on the connector from the ECU when probed with the ignition on and 12.4 when the car is running. I am earthing the multimeter with pin 6 on the connector.

If anybody with a BBY engine (or I suspect results will be same for an AUA engine) and a multimeter can check the voltages seen on their connector it would greatly appreciated. It could be right, but I would have expected a reference voltage of 5V from the ECU.

any help would be greatly appreciated.

Thanks and regards
Neil

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