P1164 GMC Code - HO2S Bank 2 Sensor 3 Rich Or High Voltage

The P1164 code indicates that the Heated Oxygen Sensor (HO2S) on Bank 2 Sensor 3 is detecting a rich condition or high voltage beyond the expected range.

Symptoms may include poor fuel economy, rough idling, loss of engine performance, a lit Check Engine Light, or increased exhaust emissions.

Common causes include a faulty HO2S sensor, wiring issues such as short circuits, a rich air-fuel mixture, a malfunctioning fuel injector, or problems with the engine control module (ECM).

Bank 2 Sensor 3 refers to the third oxygen sensor located on the side of the engine opposite the first cylinder (Bank 2) and downstream in the exhaust system.

Yes, a dirty air filter can contribute to an overly rich air-fuel mixture, potentially triggering the P1164 code.

Start by inspecting the HO2S sensor and its wiring for damage. Use a scan tool to monitor sensor voltage readings and check for rich air-fuel mixture conditions.

Driving with a P1164 code is not recommended, as it can lead to poor fuel efficiency, increased emissions, and potential damage to the catalytic converter over time.

You may need an OBDII scanner, a multimeter for testing electrical connections, and basic tools to replace the oxygen sensor if necessary.

The cost can vary, but replacing a faulty oxygen sensor typically ranges from $100 to $300, including parts and labor.

While rare, a malfunctioning Powertrain Control Module (PCM) could potentially cause the P1164 code by misinterpreting sensor data. Always rule out other causes first.