P1132moderate severityPowertrain
HO2S Circuit Low Variance Bank 1 Sensor 1
on 2020 Buick Encore 1.4L Turbo I4 · AWD
What this code means
The bank 1 upstream oxygen sensor shows little signal variation. This suggests the sensor is stuck or unresponsive.
Symptoms
- Check engine light on
- Poor fuel trim
- Reduced fuel economy
Common causes
- Faulty O2 sensor
- Contaminated sensor tip
- Wiring or connector issue
- Exhaust leak
Diagnostic steps
- Scan and graph O2 sensor voltage
- Check for flat or stuck signal
- Inspect wiring and connector
- Replace O2 sensor if unresponsive
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Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0005
Fuel Shutoff Valve A Control Circuit/Open
P0006
Fuel Shutoff Valve A Control Circuit Low
P0007
Fuel Shutoff Valve A Control Circuit High
P0008
Engine Position System Performance - Bank 1
P0009
Engine Position System Performance - Bank 2
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1