Powertrain Codes

P0689

Technical Definition:

Engine Control Module (ECM) / Powertrain Control Module (PCM) Power Relay Sensore Circuit Low

Trouble Code: P0689
Address: 0x0689
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Electronic Control Module Power Relay Sense Circuit Low

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Weak battery – Low voltage while cranking
– Faulty Engine Control Module (ECM) relay
– Blown ECM fuse
– Faulty ECM
– ECM harness is open or shorted
– ECM circuit poor electrical connection

Specific Makes:

P0683

Technical Definition:

Glow Plug Control Module to Powertrain Control Module (PCM) Communication Circuit

Trouble Code: P0683
Address: 0x0683
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Glow Plug Module Control To ECM Communication Circuit Fault

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Glow Plug Control Module (GPCM)
– GPCM harness is open or shorted
– GPCM circuit poor electrical connection
– Faulty Engine Control Module (ECM)

Specific Makes:

P0684

Technical Definition:

Glow Plug Control Module to Powertrain Control Module (PCM) Communication Circuit Range / Performance

Trouble Code: P0684
Address: 0x0684
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Glow Plug Control Module to ECM Communication Circuit Range/Performance

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Glow Plug Control Module (GPCM)
– GPCM harness is open or shorted
– GPCM circuit poor electrical connection
– Faulty Engine Control Module (ECM)

Specific Makes:

P0681

Technical Definition:

(Cylinder No.11) Glow Plug Circuit / Open

Trouble Code: P0681
Address: 0x0681
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:
  • Faulty cylinder #11 glow plug
  • Open or shorted glow plug circuit
  • Damaged wiring connector
  • Faulty glow plug control module

Possible Symptoms:
  • The engine will be hard to start or may not start at all in cold weather or when its been sitting long enough for the block to cool.
  • Lack of power until the engine heats up sufficiently.
  • Engine may miss due to the colder than normal cylinder head temperature
  • Engine may hesitate when accelerating
  • No pre-heat period, or in other words the preheat light does not go off.

Cylinder 11 Glow Plug Circuit Fault

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty cylinder #11 glow plug
– Cylinder #11 glow plug harness is open or shroted
– Cylinder #11 glow plug circuit poor electrical connection
– Faulty glow plug module

Specific Makes:

P0682

Technical Definition:

(Cylinder No.12) Glow Plug Circuit / Open

Trouble Code: P0682
Address: 0x0682
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

The diagnostic trouble code (DTC) is a generic powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model.

Possible Causes:
  • Faulty cylinder #12 glow plug
  • Open or shorted glow plug circuit
  • Damaged wiring connector
  • Faulty glow plug control module

Possible Symptoms:
  • The engine will be hard to start or may not start at all in cold weather or when its been sitting long enough for the block to cool.
  • Lack of power until the engine heats up sufficiently.
  • Engine may miss due to the colder than normal cylinder head temperature
  • Engine may hesitate when accelerating
  • No pre-heat period, or in other words the preheat light does not go off.

Cylinder 12 Glow Plug Circuit Fault

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty cylinder #12 glow plug
– Cylinder #12 glow plug harness is open or shroted
– Cylinder #12 glow plug circuit poor electrical connection
– Faulty glow plug module

Specific Makes:

P0680

Technical Definition:

(Cylinder No.10) Glow Plug Circuit / Open

Trouble Code: P0680
Address: 0x0680
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 10 Glow Plug Circuit Fault

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty cylinder #10 glow plug
– Cylinder #10 glow plug harness is open or shroted
– Cylinder #10 glow plug circuit poor electrical connection
– Faulty glow plug module

Specific Makes:

P0679

Technical Definition:

(Cylinder No.9) Glow Plug Circuit / Open

Trouble Code: P0679
Address: 0x0679
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 9 Glow Plug Circuit Fault

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty cylinder #9 glow plug
– Cylinder #9 glow plug harness is open or shroted
– Cylinder #9 glow plug circuit poor electrical connection
– Faulty glow plug module

Specific Makes:

P0675

Technical Definition:

(Cylinder No.5) Glow Plug Circuit / Open

Trouble Code: P0675
Address: 0x0675
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 5 Glow Plug Circuit Fault

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty cylinder #5 glow plug
– Cylinder #5 glow plug harness is open or shroted
– Cylinder #5 glow plug circuit poor electrical connection
– Faulty glow plug module

Specific Makes:

P0676

Technical Definition:

(Cylinder No.6) Glow Plug Circuit / Open

Trouble Code: P0676
Address: 0x0676
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 6 Glow Plug Circuit Fault

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty cylinder #6 glow plug
– Cylinder #6 glow plug harness is open or shroted
– Cylinder #6 glow plug circuit poor electrical connection
– Faulty glow plug module

Specific Makes:

P0677

Technical Definition:

(Cylinder No.7) Glow Plug Circuit / Open

Trouble Code: P0677
Address: 0x0677
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 7 Glow Plug Circuit Fault

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty cylinder #7 glow plug
– Cylinder #7 glow plug harness is open or shroted
– Cylinder #7 glow plug circuit poor electrical connection
– Faulty glow plug module

Specific Makes:

P0678

Technical Definition:

(Cylinder No.8) Glow Plug Circuit / Open

Trouble Code: P0678
Address: 0x0678
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 8 Glow Plug Circuit Fault

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty cylinder #8 glow plug
– Cylinder #8 glow plug harness is open or shroted
– Cylinder #8 glow plug circuit poor electrical connection
– Faulty glow plug module

Specific Makes:

P0673

Technical Definition:

(Cylinder No.3) Glow Plug Circuit / Open

Trouble Code: P0673
Address: 0x0673
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 3 Glow Plug Circuit Fault

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty cylinder #3 glow plug
– Cylinder #3 glow plug harness is open or shroted
– Cylinder #3 glow plug circuit poor electrical connection
– Faulty glow plug module

Specific Makes:

P0674

Technical Definition:

(Cylinder No.4) Glow Plug Circuit / Open

Trouble Code: P0674
Address: 0x0674
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 4 Glow Plug Circuit Fault

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty cylinder #4 glow plug
– Cylinder #4 glow plug harness is open or shroted
– Cylinder #4 glow plug circuit poor electrical connection
– Faulty glow plug module

Specific Makes:

P0671

Technical Definition:

(Cylinder No.1) Glow Plug Circuit / Open

Trouble Code: P0671
Address: 0x0671
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 1 Glow Plug Circuit Fault

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty cylinder #1 glow plug
– Cylinder #1 glow plug harness is open or shroted
– Cylinder #1 glow plug circuit poor electrical connection
– Faulty glow plug module

Specific Makes: