P1147
Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)
Symptoms
- Increased fuel consumption
- Check Engine Light Is On
- Reduced engine power
- Dips during acceleration
- Increased emissions of harmful substances
Causes
- Malfunction of oxygen sensor 2 (bank 1)
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Vacuum leak
- Fuel system problems (mixture too rich)
How to Fix
- Check the integrity of the wiring to the sensor
- Check the sensor connector for corrosion and damage.
- Measure the resistance and voltage of the sensor
- Replace a faulty oxygen sensor
- Reset the code and check if it appears again