P1166low severityPowertrain
HO2S Bank 1 Sensor 1 Heater Circuit Fault
on 2006 Acura RL 3.5L V6 · AWD
What this code means
The heater circuit in the upstream O2 sensor has a malfunction.
Symptoms
- CEL
- Poor cold-start economy
- Extended warm-up
- Increased emissions
Common causes
- Failed heater element
- Blown fuse
- Open/short wiring
- Corroded connector
Diagnostic steps
- Test heater resistance
- Check fuse
- Inspect wiring
- Test PCM relay
Repair notes
Replace O2 sensor or repair heater circuit.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1