What does code P1163 mean?

Q: What does code P1163 mean?

HO2S Bank 2 Sensor 3 Lean System Or Low Voltage. P1163 on a GM vehicle means the powertrain control module has detected that the downstream heated oxygen sensor on bank 2 (sensor 3) is reporting a lean condition or a low voltage signal that stays below the expected threshold. The computer is seeing a signal from that sensor that indicates either excess oxygen in the exhaust after the catalytic converter or a circuit problem pulling the voltage low.

DTC codes / GM codes / P1163

P1163 · GMHO2S Bank 2 Sensor 3 Lean System Or Low Voltage

P1163 on a GM vehicle means the powertrain control module has detected that the downstream heated oxygen sensor on bank 2 (sensor 3) is reporting a lean condition or a low voltage signal that stays below the expected threshold. The computer is seeing a signal from that sensor that indicates either excess oxygen in the exhaust after the catalytic converter or a circuit problem pulling the voltage low.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering

Guidance is general and written for GM vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.