P1153moderate severityPowertrain
Air/Fuel Sensor Circuit Response Bank 1 Sensor 2
on 2008 Toyota Highlander 3.5L V6 · AWD
What this code means
The downstream A/F sensor is switching too slowly.
Symptoms
- CEL
- Failed emissions
- Poor efficiency
- Rough idle
Common causes
- Aging sensor
- Degraded catalytic converter
- Exhaust leak
- Wiring damage
Diagnostic steps
- Monitor sensor switching
- Test catalytic efficiency
- Check exhaust leaks
- Inspect wiring
Repair notes
Replace sensor or diagnose catalytic converter.
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