Powertrain Codes

P0518

Technical Definition:

Idle Air Control Circuit Intermittent

Trouble Code: P0518
Address: 0x0518
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Idle Air Control Circuit Intermittent

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Idle Air Control Valve
– Vacuum leak
– Idle Air Control Valve harness is open or shorted
– Idle Air Control Valve circuit poor electrical connection

Specific Makes:

P0519

Technical Definition:

Idle Air Control System Performance

Trouble Code: P0519
Address: 0x0519
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Idle Air Control System Performance

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Idle Air Control Valve
– Vacuum leak
– Idle Air Control Valve harness is open or shorted
– Idle Air Control Valve circuit poor electrical connection

Specific Makes:

P0513

Technical Definition:

Incorrect Immobilizer Key

Trouble Code: P0513
Address: 0x0513
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Incorrect Immobilizer Code

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty immobilizer key
– Poor electrical connection for immobilizer circuit components
– Faulty immobilizer control unit
– Faulty immobilizer key antenna

Specific Makes:

P0514

Technical Definition:

Battery Temperature Sensor Circuit Range / Performance

Trouble Code: P0514
Address: 0x0514
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Temperature Sensor Rationality

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Battery Temperature Sensor
– Battery Temperature Sensor harness is open or shorted
– Battery Temperature Sensor circuit poor electrical connection

Specific Makes:

– Engine overheating

P0516

Technical Definition:

Battery Temperature Sensor Circuit Low

Trouble Code: P0516
Address: 0x0516
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Battery Temperature Sensor Circuit Low

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Battery Temperature Sensor
– Battery Temperature Sensor harness is open or shorted
– Battery Temperature Sensor circuit poor electrical connection

Specific Makes:

– Engine overheating

P0517

Technical Definition:

Battery Temperature Sensor Circuit High

Trouble Code: P0517
Address: 0x0517
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Battery Temperature Sensor Circuit High

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Battery Temperature Sensor
– Battery Temperature Sensor harness is open or shorted
– Battery Temperature Sensor circuit poor electrical connection

Specific Makes:

– Engine overheating

P0510

Technical Definition:

Closed Throttle Position Switch

Trouble Code: P0510
Address: 0x0510
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Closed Throttle Position Switch Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Throttle Position Switch (TPS) Adjustment
– Faulty Throttle Position Switch (TPS)
– Throttle Position Switch (TPS) harness open or shorted
– Throttle Position Switch (TPS) circuit poor electrical connection

Specific Makes:

– Engine idle problems
– Possible hard to start
– Possible shifting problems

P0511

Technical Definition:

Idle Air Control Circuit

Trouble Code: P0511
Address: 0x0511
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Idle Air Control Circuit Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Idle Air Control Valve (IACV)/Auxiliary Air Control (AAC) Valve harness is open or shorted
– Idle Air Control Valve (IACV)/Auxiliary Air Control (AAC) Valve circuit poor electrical connection
– Faulty Idle Air Control Valve (IACV)/Auxiliary Air Control (AAC) Valve

Specific Makes:

– Engine hard to start
– Rough or erratic idle speed

P0512

Technical Definition:

Starter Request Circuit

Trouble Code: P0512
Address: 0x0512
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Starter Request Circuit

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Open or short circuit condition
– Poor electrical connection

Specific Makes:

P050C

Technical Definition:

Cold Start Engine Coolant Temperature (ECT) Performance

Trouble Code: P050C
Address: 0x050C
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P0507

Technical Definition:

Idle Air Control System RPM Higher Than Expected

Trouble Code: P0507
Address: 0x0507
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Idle Control System RPM Higher Than Expected

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Dirty throttle body
– Electric throttle control actuator misadjusted or damaged
– Faulty Electric throttle control actuator
– Intake air leak
– Poor electrical connection to the Intake Air Control (IAC) valve

Specific Makes:

– Engine hard to start
– Rough or erratic idle speed

P0508

Technical Definition:

Idle Air Control System Circuit Low

Trouble Code: P0508
Address: 0x0508
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Idle Air Control System Circuit Low

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Dirty throttle body
– Electric throttle control actuator misadjusted or damaged
– Faulty Electric throttle control actuator
– Intake air leak
– Poor electrical connection to the Intake Air Control (IAC) valve

Specific Makes:

– Engine hard to start
– Rough or erratic idle speed

P0509

Technical Definition:

Idle Air Control System Circuit High

Trouble Code: P0509
Address: 0x0509
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Idle Air Control System Circuit High

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Dirty throttle body
– Electric throttle control actuator misadjusted or damaged
– Faulty Electric throttle control actuator
– Intake air leak
– Poor electrical connection to the Intake Air Control (IAC) valve

Specific Makes:

– Engine hard to start
– Rough or erratic idle speed