Error code

OBD2 P0167

OBD2P0167
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

O2 Sensor Heater Circuit.

Severity

moderateCan drive, but may fail emissions testing.

Summary

P0167 indicates an issue with the heater circuit of the downstream oxygen sensor (HO2S) on bank 2 of your engine.

Symptoms

  • Check Engine Light is illuminated

Common Causes

  • Problem on the ground side of the O2 sensor heater circuit
  • Problem on the power side of the O2 sensor heater circuit
  • High resistance in the O2 sensor heater element
  • Open circuit in the O2 sensor heater element

Diagnosis

  1. Test the heater circuit wiring for power and ground using a digital multimeter.
  2. Check the resistance of the sensor heating element to determine if it has high resistance or an open circuit.

Fixes

  • Replace the faulty oxygen sensor if there is high resistance or an open circuit in the heater element.

FAQ

What does P0167 mean?

P0167 indicates a malfunction in the heater circuit of the downstream oxygen sensor on bank 2.

How do I diagnose P0167?

Use a multimeter to test for power and ground issues in the O2 sensor's heater circuit, then check the resistance of the heating element.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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