P0153
O2 Sensor Circuit Slow Response Bank 2 Sensor 1
Severity: MEDIUM
Symptoms
- Increased fuel consumption
- Unstable engine operation at idle
- Reduced vehicle dynamics
- Check Engine Light Is On
Causes
- Oxygen sensor malfunction (Bank 2 Sensor 1)
- Contamination or damage to the sensor sensing element
- Open or short circuit in the sensor wiring harness
- Poor contact in the sensor connector
- Air leaks in the exhaust system
- Fuel system problems (such as faulty injectors)
How to Fix
- Visually check the wiring harness and sensor connector for damage.
- Check the voltage and resistance of the sensor circuit
- Clean or replace the oxygen sensor if necessary
- Check the exhaust system for leaks
- Scan the ECU for other errors
- After repair, erase the error and check engine operation