Powertrain Codes

P0310

Technical Definition:

Cylinder 10 Misfire Detected

Trouble Code: P0310
Address: 0x0310
System: Powertrain
Subsystem:
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 10 Misfire Detected

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty spark plug 10
– Clogged or faulty fuel injector 10
– Faulty ignition coil 10
– Fuel injector 10 harness is open or shorted
– Fuel injector 10 circuit poor electrical connection
– Ignition coil 10 harness is open or shorted
– Ignition coil 10 circuit poor electrical connection
– Insufficient cylinder 10 compression
– Incorrect fuel pressure
– Intake air leak

Specific Makes:

– Lack/loss of power
– Hard start
– Engine hesitation

P0305

Technical Definition:

Cylinder 5 Misfire Detected

Trouble Code: P0305
Address: 0x0305
System: Powertrain
Subsystem:
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 5 Misfire Detected

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty spark plug 5
– Clogged or faulty fuel injector 5
– Faulty ignition coil 5
– Fuel injector 5 harness is open or shorted
– Fuel injector 5 circuit poor electrical connection
– Ignition coil 5 harness is open or shorted
– Ignition coil 5 circuit poor electrical connection
– Insufficient cylinder 5 compression
– Incorrect fuel pressure
– Intake air leak

Specific Makes:

– Lack/loss of power
– Hard start
– Engine hesitation

P0306

Technical Definition:

Cylinder 6 Misfire Detected

Trouble Code: P0306
Address: 0x0306
System: Powertrain
Subsystem:
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 6 Misfire Detected

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty spark plug 6
– Clogged or faulty fuel injector 6
– Faulty ignition coil 6
– Fuel injector 6 harness is open or shorted
– Fuel injector 6 circuit poor electrical connection
– Ignition coil 6 harness is open or shorted
– Ignition coil 6 circuit poor electrical connection
– Insufficient cylinder 6 compression
– Incorrect fuel pressure
– Intake air leak

Specific Makes:

– Lack/loss of power
– Hard start
– Engine hesitation

P0304

Technical Definition:

Cylinder 4 Misfire Detected

Trouble Code: P0304
Address: 0x0304
System: Powertrain
Subsystem:
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 4 Misfire Detected

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty spark plug 4
– Clogged or faulty fuel injector 4
– Faulty ignition coil 4
– Fuel injector 4 harness is open or shorted
– Fuel injector 4 circuit poor electrical connection
– Ignition coil 4 harness is open or shorted
– Ignition coil 4 circuit poor electrical connection
– Insufficient cylinder 4 compression
– Incorrect fuel pressure
– Intake air leak

Specific Makes:

– Lack/loss of power
– Hard start
– Engine hesitation

P0303

Technical Definition:

Cylinder 3 Misfire Detected

Trouble Code: P0303
Address: 0x0303
System: Powertrain
Subsystem:
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 3 Misfire Detected

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty spark plug 3
– Clogged or faulty fuel injector 3
– Faulty ignition coil 3
– Fuel injector 3 harness is open or shorted
– Fuel injector 3 circuit poor electrical connection
– Ignition coil 3 harness is open or shorted
– Ignition coil 3 circuit poor electrical connection
– Insufficient cylinder 3 compression
– Incorrect fuel pressure
– Intake air leak

Specific Makes:

– Lack/loss of power
– Hard start
– Engine hesitation

P0302

Technical Definition:

Cylinder 2 Misfire Detected

Trouble Code: P0302
Address: 0x0302
System: Powertrain
Subsystem:
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 2 Misfire Detected

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty spark plug 2
– Clogged or faulty fuel injector 2
– Faulty ignition coil 2
– Fuel injector 2 harness is open or shorted
– Fuel injector 2 circuit poor electrical connection
– Ignition coil 2 harness is open or shorted
– Ignition coil 2 circuit poor electrical connection
– Insufficient cylinder 2 compression
– Incorrect fuel pressure
– Intake air leak

Specific Makes:

– Lack/loss of power
– Hard start
– Engine hesitation

P0301

Technical Definition:

Cylinder 1 Misfire Detected

Trouble Code: P0301
Address: 0x0301
System: Powertrain
Subsystem:
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder 1 Misfire Detected

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty spark plug 1
– Clogged or faulty fuel injector 1
– Faulty ignition coil 1
– Fuel injector 1 harness is open or shorted
– Fuel injector 1 circuit poor electrical connection
– Ignition coil 1 harness is open or shorted
– Ignition coil 1 circuit poor electrical connection
– Insufficient cylinder 1 compression
– Incorrect fuel pressure
– Intake air leak

Specific Makes:

– Lack/loss of power
– Hard start
– Engine hesitation

P0300

Technical Definition:

Random Misfire Detected

Trouble Code: P0300
Address: 0x0300
System: Powertrain
Subsystem:
Technical Description:

Possible Causes:

Possible Symptoms:

Cylinder Misfire Detected Random Cylinders

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty spark plug (s)
– Faulty ignition coil (s)
– Clogged or faulty fuel injector (s)
– Intake air leak
– Fuel injectors harness is open or shorted
– Fuel Injectors circuit poor electrical connection
– Ignition coils harness is open or shorted
– Ignition coils circuit poor electrical connection
– Insufficient cylinders compression
– Incorrect fuel pressure

Specific Makes:

– Lack/loss of power
– Hard start
– Engine hesitation