P048B

Technical Definition:

Exhaust Pressure Contorl Valve Position Sensor/Switch Circuit

Trouble Code: P048B
Address: 0x048B
System: Powertrain
Subsystem:

Technical Description:

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P048A

Technical Definition:

Exhaust Pressure Control Valve Stuck Closed

Trouble Code: P048A
Address: 0x048A
System: Powertrain
Subsystem:

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P0489

Technical Definition:

Exhaust Gas Recirculation (EGR) Control Circuit A Low

Trouble Code: P0489
Address: 0x0489
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

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P0488

Technical Definition:

Exhaust Gas Recirculation (EGR) Throttle Control Circuit A Range / Performance

Trouble Code: P0488
Address: 0x0488
System: Powertrain
Subsystem: Auxiliary Emission Controls

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Specific Makes:

P0487

Technical Definition:

Exhaust Gas Recirculation (EGR) Throttle Control Circuit A / Open

Trouble Code: P0487
Address: 0x0487
System: Powertrain
Subsystem: Auxiliary Emission Controls

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P0486

Technical Definition:

Exhaust Gas Recirculation (EGR) (Sensor B) Circuit

Trouble Code: P0486
Address: 0x0486
System: Powertrain
Subsystem: Auxiliary Emission Controls

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P0485

Technical Definition:

Fan Power / Ground Circuit

Trouble Code: P0485
Address: 0x0485
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Cooling Fan Power/Ground Circuit Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty fan control relay
– Faulty cooling fan
– Fan control relay harness is open or shorted
– Fan control relay circuit poor electrical connection
– Fan cooling fan harness is open or shorted
– Fan cooling fan circuit poor electrical connection

Specific Makes:

– Engine overheating

P0484

Technical Definition:

Fan Circuit Over Current

Trouble Code: P0484
Address: 0x0484
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Cooling Fan Circuit Over Current

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

– Engine overheating

P0483

Technical Definition:

Fan Rationality Check

Trouble Code: P0483
Address: 0x0483
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Cooling Fan Rationality Check Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

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Tech Notes:

Specific Makes:

– Engine overheating

P0482

Technical Definition:

Fan 3 Control Circuit

Trouble Code: P0482
Address: 0x0482
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Cooling Fan 3 Control Circuit Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty fan control relay
– Faulty cooling fan 3
– Fan control relay harness is open or shorted
– Fan control relay circuit poor electrical connection
– Fan cooling fan harness is open or shorted
– Fan cooling fan circuit poor electrical connection

Specific Makes:

– Engine overheating

P0481

Technical Definition:

Fan 2 Control Circuit

Trouble Code: P0481
Address: 0x0481
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Cooling Fan 2 Control Circuit Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty fan control relay
– Faulty cooling fan 2
– Fan control relay harness is open or shorted
– Fan control relay circuit poor electrical connection
– Fan cooling fan harness is open or shorted
– Fan cooling fan circuit poor electrical connection

Specific Makes:

– Engine overheating

P0480

Technical Definition:

Fan 1 Control Circuit

Trouble Code: P0480
Address: 0x0480
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Cooling Fan 1 Control Circuit Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty fan control relay
– Fan control relay harness is open or shorted
– Fan control relay circuit poor electrical connection
– Faulty cooling fan 1
– Fan cooling fan harness is open or shorted
– Fan cooling fan circuit poor electrical connection

Specific Makes:

– Engine overheating

P047F

Technical Definition:

Exhaust Pressure Control Valve Stuck Open

Trouble Code: P047F
Address: 0x047F
System: Powertrain
Subsystem:

Technical Description:

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Specific Makes:

P047E

Technical Definition:

Exhaust Pressure (Sensor B) Circuit Intermittent / Erratic

Trouble Code: P047E
Address: 0x047E
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

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Specific Makes:

P047D

Technical Definition:

Exhaust Pressure (Sensor B) Circuit High

Trouble Code: P047D
Address: 0x047D
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

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Specific Makes:

P047C

Technical Definition:

Exhaust Pressure (Sensor B) Circuit Low

Trouble Code: P047C
Address: 0x047C
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

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OBD-II Trouble Code Type:

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Specific Makes:

P047B

Technical Definition:

Exhaust Pressure (Sensor B) Circuit Range / Performance

Trouble Code: P047B
Address: 0x047B
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

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Possible Solutions:

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Specific Makes:

P047A

Technical Definition:

Exhaust Pressure (Sensor B) Circuit

Trouble Code: P047A
Address: 0x047A
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

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Possible Solutions:

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Specific Makes:

P0479

Technical Definition:

Exhaust Pressure Control Valve Intermittent

Trouble Code: P0479
Address: 0x0479
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Exhaust Pressure Control Valve Intermittent

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Exhaust Back Pressure Valve
– Exhaust Back Pressure Valve harness is open or shorted
– Exhaust Back Pressure Valve circuit poor electrical connection

Specific Makes:

P0478

Technical Definition:

Exhaust Pressure Control Valve High

Trouble Code: P0478
Address: 0x0478
System: Powertrain
Subsystem: Auxiliary Emission Controls

Technical Description:

Possible Causes:

Possible Symptoms:

Exhaust Pressure Control Valve High

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Exhaust Back Pressure Valve
– Exhaust Back Pressure Valve harness is open or shorted
– Exhaust Back Pressure Valve circuit poor electrical connection