P1163
Heated Oxygen Sensor 1 Lean Shift Monitoring Bank 2
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Unstable engine operation
- Increased fuel consumption
- Power Loss
- Check Engine Light Is On
- Dips during acceleration
Causes
- Oxygen sensor malfunction
- Vacuum leak
- Clogged fuel injectors
- Fuel pump malfunction
- Problems with the mass air flow sensor (MAF)
How to Fix
- Check the oxygen sensor for functionality
- Look for vacuum leaks in the intake system
- Check fuel pressure
- Clean or replace fuel injectors
- Check the operation of the mass air flow sensor