HO2S Insufficient Switching Bank 2 Sensor 1
2002-2009 GMC Envoy 4.2L I6 🇩🇪
Description
The PCM determined that the upstream O2 sensor on Bank 2 is not switching between rich and lean often enough during closed-loop operation. This is the Bank 2 counterpart to P1133 and the two codes are frequently seen together.
Symptoms
- Check Engine Light
- Poor fuel economy
- Rough idle
- Hesitation
- Failed emissions test
Common Causes
- Faulty or lazy upstream O2 sensor Bank 2
- Exhaust leak near sensor
- Vacuum leak
- Fuel delivery issue
- MAF sensor contamination
Diagnostic Steps
- Monitor O2 sensor switching rate with scan tool
- Check for exhaust leaks
- Perform vacuum leak test
- Test fuel pressure
- Clean or test MAF sensor
Repair Notes
Replace upstream O2 sensor Bank 2. Check for exhaust leaks. Commonly appears alongside P1133.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
P1153 on Other Vehicles
Common Questions
What does code P1153 mean on a 2002-2009 GMC Envoy?
P1153 stands for "HO2S Insufficient Switching Bank 2 Sensor 1". The PCM determined that the upstream O2 sensor on Bank 2 is not switching between rich and lean often enough during closed-loop operation. This is the Bank 2 counterpart to P1133 and the two codes are frequently seen together.
What are the symptoms of P1153 on a GMC Envoy?
Common symptoms of P1153 include: Check Engine Light, Poor fuel economy, Rough idle, Hesitation, Failed emissions test.
What causes P1153 on a 2002-2009 GMC Envoy?
Common causes of P1153 include: Faulty or lazy upstream O2 sensor Bank 2, Exhaust leak near sensor, Vacuum leak, Fuel delivery issue, MAF sensor contamination.