Circuit Description

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

Refer to DTC P2195 on DTC P2195, P2196: OXYGEN (A/F) SENSOR SIGNAL STUCK (BANK 1 SENSOR 1) .

HINT:

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

Fig 1: Oxygen (A/F) Sensor Heater Control Low And High Circuit Diagram (Bank 1 Sensor 1)

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Fig 2: Diagnostic Trouble Detection Chart (DTC - P0031/32)

HINT:

Sensor 1 refers to the sensor closest to the engine assembly.