P0329

Technical Definition:

Knock Sensor 1) Circuit Intermittent (Bank 1 or Single Sensor

Trouble Code: P0329
Address: 0x0329
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

Possible Causes:

Possible Symptoms:

Knock Sensor Circuit Intermittent

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty knock sensor
– Knock sensor circuit poor electrical connection
– Knock sensor harness is open or shorted
– Faulty Engine Control Module (ECM)

Specific Makes:

– Possible Lack/Loss of Power

P0328

Technical Definition:

Knock Sensor 1) Circuit High (Bank 1 or Single Sensor

Trouble Code: P0328
Address: 0x0328
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

Knock sensors are used to detect engine pre-detonation (engine knock or ping). The knock sensor (KS) is usually a two wire sensor. A 5 volt reference is supplied to the sensor and there is a signal return from the knock sensor to the PCM (powertrain control module).

Possible Causes:
  • Knock sensor connector is damaged
  • Knock sensor circuit is open or shorted to ground
  • Knock sensor circuit is shorted to voltage
  • Knock sensor has failed
  • Loose knock sensor
  • Electrical interference in circuit
  • Low fuel pressure
  • Incorrect fuel octane
  • Mechanical engine problem
  • Failed/faulty PCM

Possible Symptoms:
  • MIL (Malfunction Indicator Lamp) illumination
  • Audible knocking from the engine compartment
  • Pinging from engine under acceleration
  • Loss of power
  • Irregular RPM

Knock Sensor Circuit High Input

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty knock sensor
– Knock sensor circuit poor electrical connection
– Knock sensor harness is open or shorted
– Faulty Engine Control Module (ECM)

Specific Makes:

– Possible Lack/Loss of Power

P0327

Technical Definition:

Knock Sensor 1) Circuit Low (Bank 1 or Single Sensor

Trouble Code: P0327
Address: 0x0327
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

A knock sensor tells the engine computer when one or more of your engine’s cylinders are “knocking”, that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged.

Possible Causes:
  • The knock sensor is faulty and needs to be replaced
  • There is a wiring open/short/fault in the knock sensor circuit
  • The PCM/ECM has failed

Possible Symptoms:

Knock Sensor Circuit Low Input

Possible Solutions:
  • Verify the resistance of the knock sensor (compare it to factory specs)
  • Inspect for broken/frayed wires leading to the sensor
  • Check the wiring and connections leading to/from the knock sensor and PCM/ECM
  • Verify proper voltage is reaching the knock sensor (e.g. 5 volts)
  • Verify proper grounding of sensor and circuit
  • Replace the knock sensor
  • Replace the PCM/ECM

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty knock sensor
– Knock sensor circuit poor electrical connection
– Knock sensor harness is open or shorted
– Faulty Engine Control Module (ECM)

Specific Makes:

– Possible Lack/Loss of Power

P0326

Technical Definition:

Knock Sensor 1) Circuit Range / Performance (Bank 1 or Single Sensor

Trouble Code: P0326
Address: 0x0326
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

Knock sensors are used to detect engine pre-detonation (engine knock or ping). The knock sensor (KS) is usually a two wire sensor. A 5 volt reference is supplied to the sensor and there is a signal return from the knock sensor to the PCM (powertrain control module).

Possible Causes:
  • Knock sensor connector is damaged
  • Knock sensor circuit is open or shorted to ground
  • Knock sensor circuit is shorted to voltage
  • Knock sensor has failed
  • Moisture in knock sensor connectors
  • Incorrect fuel octane
  • PCM has failed

Possible Symptoms:
  • MIL (Malfunction Indicator Lamp) illumination
  • Audible knocking from the engine compartment
  • Pinging from engine under acceleration

Knock Sensor Circuit Range/Performance

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty knock sensor
– Knock sensor circuit poor electrical connection
– Knock sensor harness is open or shorted
– Faulty Engine Control Module (ECM)

Specific Makes:

– Possible Lack/Loss of Power

P0325

Technical Definition:

Knock (Sensor 1) Circuit (Bank 1) or Single Sensor

Trouble Code: P0325
Address: 0x0325
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

A knock sensor tells the engine computer when one or more of your engine’s cylinders are “knocking”, that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged.

Possible Causes:
  • The knock sensor is faulty and needs to be replaced
  • There is a wiring short/fault in the knock sensor circuit

Possible Symptoms:

Knock Sensor Circuit Malfunction

Possible Solutions:
  • Check the resistance of the knock sensor (compare it to factory specs)
  • Check for broken/frayed wires leading to the sensor
  • Replace the knock sensor

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty knock sensor
– Knock sensor circuit poor electrical connection
– Knock sensor harness is open or shorted
– Faulty Engine Control Module (ECM)

Specific Makes:

– Possible Lack/Loss of Power

P0324

Technical Definition:

Knock Control System Error

Trouble Code: P0324
Address: 0x0324
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

Possible Causes:

Possible Symptoms:

Knock Control System Error

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty knock sensor
– Knock sensor circuit poor electrical connection
– Knock sensor harness is open or shorted
– Faulty Engine Control Module (ECM)

Specific Makes:

– Possible Lack/Loss of Power

P0323

Technical Definition:

Ignition / Distributor Engine Speed Input Circuit Intermittent

Trouble Code: P0323
Address: 0x0323
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

Possible Causes:

Possible Symptoms:

Ignition/Distributor Engine Speed Input Circuit Intermittent

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Ignition/Distributor engine speed sensor harness is open or shorted
– Ignition/Distributor engine speed sensor circuit poor electrical connection
– Faulty Ignition/Distributor engine speed sensor
– Faulty Crankshaft Position sensor
– Low battery charge
– Faulty Engine Control Module (ECM)

Specific Makes:

– Lack/Loss of Power
– The engine may be harder to start
– The engine may stumble or stall

P0322

Technical Definition:

Ignition / Distributor Engine Speed Input Circuit No Signal

Trouble Code: P0322
Address: 0x0322
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

Possible Causes:

Possible Symptoms:

Ignition/Distributor Engine Speed Input Circuit No Signal

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Ignition/Distributor engine speed sensor
– Ignition/Distributor engine speed sensor harness is open or shorted
– Ignition/Distributor engine speed sensor circuit poor electrical connection
– Faulty Crankshaft Position sensor
– Low battery charge
– Faulty Engine Control Module (ECM)

Specific Makes:

– Lack/Loss of Power
– The engine may be harder to start
– The engine may stumble or stall

P0321

Technical Definition:

Ignition / Distributor Engine Speed Input Circuit Range / Performance

Trouble Code: P0321
Address: 0x0321
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

Possible Causes:

Possible Symptoms:

Ignition/Distributor Engine Speed Input Circuit Range/Performance

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Ignition/Distributor engine speed sensor
– Ignition/Distributor engine speed sensor harness is open or shorted
– Ignition/Distributor engine speed sensor circuit poor electrical connection
– Faulty Crankshaft Position sensor
– Low battery charge
– Faulty Engine Control Module (ECM)

Specific Makes:

– Lack/Loss of Power
– The engine may be harder to start
– The engine may stumble or stall

P0320

Technical Definition:

Ignition / Distributor Engine Speed Input Circuit

Trouble Code: P0320
Address: 0x0320
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

Possible Causes:

Possible Symptoms:

Ignition/Distributor Engine Speed Input Circuit

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Ignition/Distributor engine speed sensor
– Faulty Crankshaft Position sensor
– Ignition/Distributor engine speed sensor harness is open or shorted
– Ignition/Distributor engine speed sensor circuit poor electrical connection
– Low battery charge
– Faulty Engine Control Module (ECM)

Specific Makes:

– Lack/Loss of Power
– The engine may be harder to start
– The engine may stumble or stall

P0316

Technical Definition:

Engine Misfire Detected on Startup (First 1000 Revolutions)

Trouble Code: P0316
Address: 0x0316
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

Possible Causes:
  • Damaged or defective Crankshaft Position Sensor (CKP)
  • CKP sensor wiring or connector fault
  • Poor fuel quality
  • Ran out of fuel
  • Ignition system malfunction
  • Fuel system malfunction: injector or fuel pump
  • Mechanical engine problem
  • Damaged PCM

Possible Symptoms:
  • MIL (Malfunction indicator lamp) illumination
  • Rough engine start or idle

Engine Misfire Detected on Startup

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Crankshaft Position (CKP)
– Crankshaft Position (CKP) sensor harness is open or shorted
– Crankshaft Position (CKP) sensor circuit poor electrical connection
– Ignition System
– Fuel Injectors
– Running out of fuel
– Fuel Quality
– Faulty Engine Control Module (ECM)

Specific Makes:

– Engine fails to start
– Engine runs rough

P0315

Technical Definition:

Crankshaft Position (CKP) System Variation Not Learned

Trouble Code: P0315
Address: 0x0315
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

Possible Causes:

Possible Symptoms:

Crankshaft Position System Variation Not Learned

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Crankshaft Position (CKP)
– Crankshaft Position (CKP) sensor harness is open or shorted
– Crankshaft Position (CKP) sensor circuit poor electrical connection
– Damaged crankshaft pulse wheel teeth

Specific Makes:

– Engine fails to start
– Engine runs rough

P0313

Technical Definition:

Misfire Detected With Low Fuel

Trouble Code: P0313
Address: 0x0313
System: Powertrain
Subsystem: Ignition System or Engine Misfire
Technical Description:

Possible Causes:

Possible Symptoms:

Misfire Detected With Low Fuel

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Not enough fuel in tank
– Faulty spark plugs plug wires
– Faulty injectors
– Vacuum leaks
– Faulty Fuel Sender Unit
– Fuel Sender Unit harness open or shorted
– Fuel Sender Unit poor electrical connection

Specific Makes:

P0312

Technical Definition:

Cylinder 12 Misfire Detected

Trouble Code: P0312
Address: 0x0312
System: Powertrain
Subsystem:
Technical Description:

Possible Causes:
  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • Defective computer

Possible Symptoms:
  • the engine may be harder to start
  • the engine may stumble / stumble, and/or hesitate
  • other symptoms may also be present

Cylinder 12 Misfire Detected

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty spark plug 12
– Clogged or faulty fuel injector 12
– Faulty ignition coil 12
– Fuel injector 12 harness is open or shorted
– Fuel injector 12 circuit poor electrical connection
– Ignition coil 12 harness is open or shorted
– Ignition coil 12 circuit poor electrical connection
– Insufficient cylinder 12 compression
– Incorrect fuel pressure
– Intake air leak

Specific Makes:

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

P0311

Technical Definition:

Cylinder 11 Misfire Detected

Trouble Code: P0311
Address: 0x0311
System: Powertrain
Subsystem:
Technical Description:

Possible Causes:
  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • Defective computer

Possible Symptoms:
  • The engine may be harder to start
  • The engine may stumble / stumble, and/or hesitate
  • Other symptoms may also be present

Cylinder 11 Misfire Detected

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty spark plug 11
– Clogged or faulty fuel injector 11
– Faulty ignition coil 11
– Fuel injector 11 harness is open or shorted
– Fuel injector 11 circuit poor electrical connection
– Ignition coil 11 harness is open or shorted
– Ignition coil 11 circuit poor electrical connection
– Insufficient cylinder 11 compression
– Incorrect fuel pressure
– Intake air leak

Specific Makes:

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