HO2S Circuit Low Variance Bank 1 Sensor 1
2019-2019 Buick Enclave 3.6L V6
The 2019 Buick Enclave is equipped with a 3.6L V6 engine. Below you'll find detailed p1130 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
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 2019-2019 Buick Enclave?
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 Enclave?
Common symptoms of P1130 include: Check Engine Light, Poor fuel economy, Failed emissions test, Rough idle.
What causes P1130 on a 2019-2019 Buick Enclave?
Common causes of P1130 include: Lazy or contaminated O2 sensor, Exhaust leak near sensor, Vacuum leak affecting air/fuel ratio, Fuel delivery issue.
Last updated: March 2026