P1155
Air/Fuel Sensor Heater Circuit Bank 1 Sensor 2
2001-2006 Lexus LS 430 4.3L V8
Low SeverityPowertrain
Description
Heater circuit fault in the downstream A/F sensor.
Symptoms
- CEL
- Poor cold-start economy
- Increased warm-up emissions
Common Causes
- Failed heater element
- Open wiring
- Blown fuse
- Corroded connector
Diagnostic Steps
- Test heater resistance
- Check fuse
- Inspect wiring
Repair Notes
Replace sensor or repair heater circuit.
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
P1155 on Other Vehicles
Common Questions
What does code P1155 mean on a 2001-2006 Lexus LS 430?
P1155 stands for "Air/Fuel Sensor Heater Circuit Bank 1 Sensor 2". Heater circuit fault in the downstream A/F sensor.
What are the symptoms of P1155 on a Lexus LS 430?
Common symptoms of P1155 include: CEL, Poor cold-start economy, Increased warm-up emissions.
What causes P1155 on a 2001-2006 Lexus LS 430?
Common causes of P1155 include: Failed heater element, Open wiring, Blown fuse, Corroded connector.