P1135moderate severityPowertrain
Air/Fuel Sensor Heater Circuit Bank 1 Sensor 1
on 2012 Toyota Highlander 3.5L V6 · AWD
What this code means
The heater circuit in the A/F sensor Bank 1 Sensor 1 is not performing correctly.
Symptoms
- CEL
- Poor cold-start economy
- Extended warm-up
- Failed emissions
Common causes
- Failed heater element
- Open/short in heater wiring
- Blown fuse
- Poor connector
Diagnostic steps
- Test heater resistance
- Check fuse
- Inspect wiring
- Test ECM heater driver
Repair notes
Replace A/F sensor or repair heater circuit.
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
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1