P0054: HO2S Heater Resistance Bank 1 Sensor 2 (PCM)
MediumPowertrainO2 Sensors
What does P0054 mean?
P0054 is a diagnostic trouble code indicating "HO2S Heater Resistance Bank 1 Sensor 2 (PCM)". A sensor in the o2 sensors is reporting abnormal data or has lost communication with the ECU. Sensors can fail due to age, contamination, heat exposure, or wiring issues.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- Intermittent warning lights
- Erratic gauge readings
Estimated repair cost
Typical range in Australia (parts + labour)
$120 – $450 AUD
Common causes
- Faulty o2 sensors component
- Wiring or connector issue in the related circuit
- Failed sensor providing incorrect readings
- Software/calibration issue requiring ECU update
- Related component causing secondary fault
What should you do?
This code sits in a powertrain control module. The engine or transmission can drop into limp mode or cut out, which is its own hazard in traffic or on a motorway. Get it diagnosed before your next trip rather than waiting for the next service.
Get a diagnosis for YOUR car
Code P0054 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.