P1163 Possible Causes
- Faulty pre-catalyst heated oxygen sensor, bank 2
- Faulty pre-catalyst heated oxygen sensor 1 heater
- Fuel pressure
- Faulty fuel injectors
- Intake air leaks
How is Code P1163 Repaired?
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)
P1163 Meaning
The heated oxygen sensor 1 is placed in the front pipe. It detects the amount of oxygen in the exhaust gases compared to the outside air. The heated oxygen sensor 1 has a closed-end zirconia ceramic tube. Zirconia generates a voltage from about 1 V under rich conditions to 0 V under lean conditions. The signal from heated oxygen sensor 1 is sent to the ECM. The ECM adjusts the fuel injection pulse width to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the steep change from 1V to 0V.