P1167 2004 Nissan Maxima Code - Heated Rear Oxygen Sensor 2 Maximum Voltage Monitoring Bank 2

P1167 refers to "Heated Rear Oxygen Sensor 2 Maximum Voltage Monitoring Bank 2," indicating an issue with the rear oxygen sensor on Bank 2 detecting an abnormally high voltage.

Symptoms may include the check engine light turning on, decreased fuel efficiency, poor engine performance, or difficulty passing an emissions test.

Common causes include a faulty rear oxygen sensor (Bank 2, Sensor 2), damaged wiring or connectors, exhaust leaks, or issues with the engine control module (ECM).

Start by inspecting the wiring and connectors for damage or corrosion, check the oxygen sensor for proper operation, and use a multimeter to test voltage readings.

While the car may still be drivable, operating it with this code can lead to poor fuel economy, increased emissions, and potential damage to other components over time.

Repairs may include replacing the faulty rear oxygen sensor (Bank 2, Sensor 2), repairing damaged wiring, fixing exhaust leaks, or updating/reprogramming the ECM if necessary.

Replacing the rear oxygen sensor typically costs $150–$300, depending on parts and labor. Additional repairs for wiring or exhaust leaks may increase the cost.

You’ll need an OBDII scanner, a multimeter, and basic hand tools to inspect and replace the oxygen sensor or repair wiring.

While not a common cause, a failing catalytic converter can sometimes disrupt oxygen sensor readings and trigger related codes.

Clearing the code will temporarily turn off the check engine light, but the issue will return unless the underlying problem is properly diagnosed and repaired.