P0155
O2 Sensor Heater Circuit Bank 2 Sensor 1
2013-2013 Cadillac ATS 3.6L V6
Low SeverityPowertrainGeneric (SAE)
The 2013 Cadillac ATS is equipped with a 3.6L V6 engine. Below you'll find detailed p0155 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Malfunction in the upstream O2 sensor heater on Bank 2.
Symptoms
- Check Engine Light
- Extended warmup emissions
Common Causes
- Faulty heater
- Blown fuse
- Wiring issue
Diagnostic Steps
- Check fuse
- Test heater resistance
- Inspect wiring
Repair Notes
Replace O2 sensor.
Related Codes
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
P0155 on Other Vehicles
Common Questions
What does code P0155 mean on a 2013-2013 Cadillac ATS?
P0155 stands for "O2 Sensor Heater Circuit Bank 2 Sensor 1". Malfunction in the upstream O2 sensor heater on Bank 2.
What are the symptoms of P0155 on a Cadillac ATS?
Common symptoms of P0155 include: Check Engine Light, Extended warmup emissions.
What causes P0155 on a 2013-2013 Cadillac ATS?
Common causes of P0155 include: Faulty heater, Blown fuse, Wiring issue.
Last updated: March 2026