Rear heated oxygen sensor (HO2S), bank x

Measurement range -0.2 to +1.13.

The signal from the rear heated oxygen sensor (HO2S) to the engine control module (ECM).

Normal value when the engine is running at even load is approximately 0.6 V.

Voltage can vary between -0.2 and 0.9 V. During conditions such as engine braking, voltage can reduce to -0.2 V.