P1155 GMC Possible Causes
- Faulty O2 sensor heater, Bank 2 Sensor 1
- O2 sensor heater, Bank 2 Sensor 1 harness open or short circuit
- O2 sensor heater circuit, Bank 2 Sensor 1 poor electrical connection
How to Fix GMC Code P1155?
Start by checking the “Possible Causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or engine service warning light soon)
P1155 GMC Meaning
HO2S Lean Average Bank 2 Sensor 1 is the generic description for GMC code P1155, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about OBDII code P1155 GMC.