Powertrain Codes

P0054

Technical Definition:

Heated Oxygen Sensor (HO2S) Heater Resistance (Bank 1 – Sensor 2)

Trouble Code: P0054
Address: 0x0054
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:

HO2S Heater Resistance Bank 1 Sensor 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Heated Oxygen Sensor Bank 1 Sensor 2
– Heated Oxygen Sensor Bank 1 Sensor 2 harness is open or shorted
– Heated Oxygen Sensor Bank 1 Sensor 2 circuit poor electrical connection

Specific Makes:

P0055

Technical Definition:

Heated Oxygen Sensor (HO2S) Heater Resistance (Bank 1 – Sensor 3)

Trouble Code: P0055
Address: 0x0055
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:

HO2S Heater Resistance Bank 1 Sensor 3

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Heated Oxygen Sensor Bank 1 Sensor 3
– Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted
– Heated Oxygen Sensor Bank 1 Sensor 3 circuit poor electrical connection

Specific Makes:

P0050

Technical Definition:

Heated Oxygen Sensor (HO2S) Heater Control Circuit (Bank 2 – Sensor 1)

Trouble Code: P0050
Address: 0x0050
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:
  • Lengthened time needed to achieve closed loop
  • MIL (Malfunction indicator lamp) illumination
  • Possibly decreased fuel mileage depending on fault

HO2S Heater Control Circuit Bank 2 Sensor 1

Possible Solutions:
  • Failed or damaged heater circuit element inside the HO2S
  • Open on the O2 sensor heater’s ground circuit
  • Open or short on O2 sensor heater’s B+ battery feed
  • Possible ECM failure

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical connection
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 fuse
– Faulty Engine Control Module (ECM)

Specific Makes:

P0051

Technical Definition:

Heated Oxygen Sensor (HO2S) Heater Control Circuit Low (Bank 2 – Sensor 1)

Trouble Code: P0051
Address: 0x0051
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:
  • A short in the heater circuit in the sensor
  • A failed O2 sensor heater
  • Wiring/connectors broken/frayed leading to sensor and/or relay
  • Failed PCM/ECM

Possible Symptoms:

HO2S Heater Control Circuit Low Bank 2 Sensor 1

Possible Solutions:
  • check for 12 volts at the heater circuit feed (hint: unplug the sensor and check at the wiring connector to do this measurement)
  • check the ground circuit for continuity
  • measure the resistance of the heater circuit (done on the sensor itself)
  • measure the resistance and voltage of the wiring

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical connection
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 fuse
– Faulty Engine Control Module (ECM)

Specific Makes:

P0052

Technical Definition:

Heated Oxygen Sensor (HO2S) Heater Control Circuit High (Bank 2 – Sensor 1)

Trouble Code: P0052
Address: 0x0052
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:
  • A short in the heater circuit in the sensor
  • A failed O2 sensor heater
  • Wiring/connectors broken/frayed leading to sensor and/or relay
  • Failed PCM/ECM

Possible Symptoms:

HO2S Heater Control Circuit High Bank 2 Sensor 1

Possible Solutions:
  • check for 12 volts at the heater circuit feed (hint: unplug the sensor and check at the wiring connector to do this measurement)
  • check the ground circuit for continuity
  • measure the resistance of the heater circuit (done on the sensor itself)
  • measure the resistance and voltage of the wiring

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical connection
– Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse
– Faulty Engine Control Module (ECM)

Specific Makes:

P0053

Technical Definition:

Heated Oxygen Sensor (HO2S) Heater Resistance (Bank 1 – Sensor 1)

Trouble Code: P0053
Address: 0x0053
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:

HO2S Heater Resistance Bank 1 Sensor 1

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Heated Oxygen Sensor Bank 1 Sensor 1
– Heated Oxygen Sensor Bank 1 Sensor 1 harness is open or shorted
– Heated Oxygen Sensor Bank 1 Sensor 1 circuit poor electrical connection

Specific Makes:

P004E

Technical Definition:

Turbocharger / Supercharger Boost Control (Solenoid A) Circuit Intermittent / Erratic

Trouble Code: P004E
Address: 0x004E
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

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OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P004F

Technical Definition:

Turbocharger / Supercharger Boost Control (Solenoid B) Circuit Intermittent / Erratic

Trouble Code: P004F
Address: 0x004F
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

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OBD-II Trouble Code Type:

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Specific Makes:

P004C

Technical Definition:

Turbocharger / Supercharger Boost Control (Solenoid B) Circuit Low

Trouble Code: P004C
Address: 0x004C
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

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OBD-II Trouble Code Type:

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Specific Makes:

P004D

Technical Definition:

Turbocharger / Supercharger Boost Control (Solenoid B) Circuit High

Trouble Code: P004D
Address: 0x004D
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:

Possible Solutions:

OBD-II Trouble Code Type:

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Specific Makes:

P0049

Technical Definition:

Turbocharger / Supercharger Turbine Overspeed

Trouble Code: P0049
Address: 0x0049
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:

Turbocharger/Supercharger Turbine Overspeed

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P004A

Technical Definition:

Turbocharger / Supercharger Boost Control (Solenoid B) Circuit / Open

Trouble Code: P004A
Address: 0x004A
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:

Possible Solutions:

OBD-II Trouble Code Type:

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Specific Makes:

P0045

Technical Definition:

Turbocharger / Supercharger Boost Control (Solenoid A) Circuit / Open

Trouble Code: P0045
Address: 0x0045
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:

Possible Solutions:

OBD-II Trouble Code Type:

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Tech Notes:

Specific Makes:

P0047

Technical Definition:

Turbocharger / Supercharger Boost Control (Solenoid A) Circuit Low

Trouble Code: P0047
Address: 0x0047
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:

Possible Solutions:

OBD-II Trouble Code Type:

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Tech Notes:

Specific Makes:

P0048

Technical Definition:

Turbocharger / Supercharger Boost Control (Solenoid A) Circuit High

Trouble Code: P0048
Address: 0x0048
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:

Possible Solutions:

OBD-II Trouble Code Type:

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Specific Makes:

P0041

Technical Definition:

Oxygen (O2) Sensor Signals Swapped (Bank 1 – Sensor 2) / (Bank 2 – Sensor 2)

Trouble Code: P0041
Address: 0x0041
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:

O2 Sensor Signals Swapped Bank 1 Sensor 2/Bank 2 Sensor 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– HO2S Bank 1 and 2 Sensor 2 harness is open or shorted
– HO2S Bank 1 and 2 Sensor 2 circuit connectors (wrong connection)
– Faulty Engine Control Module (ECM)

Specific Makes:

P0042

Technical Definition:

Heated Oxygen Sensor (HO2S) Heater Control Circuit (Bank 1 – Sensor 3)

Trouble Code: P0042
Address: 0x0042
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:

HO2S Heater Control Circuit Bank 1 Sensor 3

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3
– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 is open shorted to ground
– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 poor electrical connection
– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 fuse
– Faulty Engine Control Module (ECM)

Specific Makes: