Circuit Description

WARNING: This page is about a different variant/trim than selected.

Refer to DTC P0136 on DTC P0136, P0137, P0138: OXYGEN SENSOR CIRCUIT (BANK 1 SENSOR 2) .

HINT:

The ECM provides a pulse width a modulated control circuit to adjust current through the heater. The oxygen sensor heater circuit uses a relay on the +B side of the circuit.

Fig 1: Oxygen Sensor Heater Circuit Diagram (Bank 1 Sensor 2)

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Fig 2: DTC Trouble Detection Chart (DTC - P0037/38)

HINT:

Sensor 2 refers to the sensor farthest away from the engine assembly.