P1163 INFINITI Possible Causes
- Faulty heated oxygen sensor, bank 2
- Faulty heated oxygen sensor 1 heater
- Fuel pressure
- Faulty fuel injectors
- Intake air leaks
How to Fix Code P1163 INFINITI?
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.
Technical Notes
If there is no intake air leak, the most likely cause of code P1163 is the front O2 sensor bank 2.
When is the Code Detected?
The sensor’s maximum and minimum voltages are not reached at the specified voltages.
Possible Symptoms
- Engine light on (or engine service warning light soon)
P1163 INFINITI 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 of about 1 V under richer conditions to 0 V under leaner conditions. The signal from heated oxygen sensor 1 is sent to the ECM. The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the sharp change from 1V to 0V.