p0055 ho2s heater resistance bank 1 sensor 3 pcm
P0055 HO2S Heater Resistance Bank 1 Sensor 3 PCM
- OBD2 Code: P0055
- Description: HO2S Heater Resistance Bank 1 Sensor 3
- Definition: The Powertrain Control Module (PCM) has detected a problem with the heater circuit of the heated oxygen sensor (HO2S) located in bank 1, sensor 3. This code indicates that the resistance in the heater circuit is not within the expected range.
p0055 – HO2S Heater Resistance Bank 1 Sensor 3 PCM
Typical Severity: Moderate
Common Causes
OBD2 Code: P0055
Description: HO2S Heater Resistance Bank 1 Sensor 3 PCM
Common Causes:
- Faulty oxygen sensor heater circuit
- Open or short in the wiring harness for the oxygen sensor heater circuit
- Poor electrical connection related to the oxygen sensor heater circuit
- Faulty PCM (Powertrain Control Module)
Common Misdiagnosis
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OBD2 Code: P0055
Description: HO2S Heater Resistance Bank 1 Sensor 3
Common Misdiagnosis: Replacing the oxygen sensor without checking the wiring or connections for damage or corrosion.
Common Diagnostic Steps
OBD2 Code: P0055
Description: HO2S Heater Resistance Bank 1 Sensor 3
- Verify the code with an OBD-II scanner.
- Inspect the wiring and connectors for damage or corrosion in the oxygen sensor circuit.
- Check the resistance of the heater element in Bank 1 Sensor 3 using a multimeter. Compare it to manufacturer specifications.
- If resistance is out of specification, replace the oxygen sensor.
- Examine related fuses and relays for faults or failures.
- Test voltage supply to the heater circuit from the PCM (Powertrain Control Module).
- If necessary, check for any updates or technical service bulletins (TSBs) related to this issue from the vehicle manufacturer.
- Clear codes and test drive to see if P0055 returns after repairs are made.