HO2S Circuit Low Variance Bank 1 Sensor 1
2002-2007 Buick Rendezvous 3.5L V6
Description
The PCM detected that the upstream heated oxygen sensor on Bank 1 is not showing enough voltage variation during closed-loop fuel control. The sensor signal is too steady when it should be switching between rich and lean.
Symptoms
- Check Engine Light
- Poor fuel economy
- Failed emissions test
- Rough idle
Common Causes
- Lazy or contaminated O2 sensor
- Exhaust leak near sensor
- Vacuum leak affecting air/fuel ratio
- Fuel delivery issue
Diagnostic Steps
- Monitor O2 sensor waveform with scan tool
- Check for exhaust leaks near sensor
- Perform vacuum leak test
- Test fuel pressure
- Inspect O2 sensor for contamination
Repair Notes
Replace upstream O2 sensor Bank 1. Check for exhaust and vacuum leaks.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1130 on Other Vehicles
Common Questions
What does code P1130 mean on a 2002-2007 Buick Rendezvous?
P1130 stands for "HO2S Circuit Low Variance Bank 1 Sensor 1". The PCM detected that the upstream heated oxygen sensor on Bank 1 is not showing enough voltage variation during closed-loop fuel control. The sensor signal is too steady when it should be switching between rich and lean.
What are the symptoms of P1130 on a Buick Rendezvous?
Common symptoms of P1130 include: Check Engine Light, Poor fuel economy, Failed emissions test, Rough idle.
What causes P1130 on a 2002-2007 Buick Rendezvous?
Common causes of P1130 include: Lazy or contaminated O2 sensor, Exhaust leak near sensor, Vacuum leak affecting air/fuel ratio, Fuel delivery issue.