Rear heated oxygen sensor (HO2S), bank x

Measurement range -0.2 to +1.13.

Signal from 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.

The voltage may vary between -0.2 and 0.9 V. The voltage may, during engine braking for example, drop to -0.2 V.