OBD Fault Codes P0500-P0599 (Engine Idling Control)

Trouble codes between P0500 and P0599 relate to the engine idling control and related processes.


Click on each fault code number to read in more detail their meanings, potential causes and fixes.


Code

Meaning

P0500

Vehicle Speed Sensor Malfunction

P0501

Vehicle Speed Sensor Range/Performance

P0502

Vehicle Speed Sensor Circuit Low Input

P0503

Vehicle Speed Sensor Intermittent/Erratic/High

P0504

Brake Switch A / B Correlation

P0505

Idle Control System Malfunction

P0506

Idle Control System RPM lower Than Expected

P0507

Idle Control System RPM higher Than Expected

P0508

Idle Air Control System Circuit Low

P0509

Idle Air Control System Circuit High

P0510

Closed Throttle Position Switch Malfunction

P0511

​Idle Air Control Circuit

P0512

Starter Request Circuit

P0513

​Incorrect Immobilizer Key

P0514

Battery Temperature Sensor Circuit Range/Performance

P0515

Battery Temperature Sensor Circuit

P0516

Battery Temperature Sensor Circuit Low

P0517

Battery Temperature Sensor Circuit High

P0518

​Idle Air Control Circuit Intermittent

P0519

Idle Air Control Circuit System Performance

P0520

Engine Oil Pressure Sensor/Switch Circuit Malfunction

P0521

Engine Oil Pressure Sensor/Switch Range/Performance

P0522

Engine Oil Pressure Sensor/Switch Low Voltage

P0523

Engine Oil Pressure Sensor/Switch High Voltage

P0524

Engine Oil Pressure Too Low

P0525

Cruise Control Servo Control Circuit Range/Performance

P0526

Fan Speed Sensor Circuit

P0527

Fan Speed Sensor Circuit Range/Performance

P0528

Fan Speed Sensor Circuit No Signal

P0529

Fan Speed Sensor Circuit Intermittent

P0530

A/C Refrigerant Pressure Sensor Circuit Malfunction

P0531

A/C Refrigerant Pressure Sensor Circuit Range/Performance

P0532

​A/C Refrigerant Pressure Sensor Circuit Low Input

P0533

A/C Refrigerant pressure Sensor Circuit High Input

P0534

Air Conditioner Refrigerant Charge Loss

P0535

A/C Evaporator Temperature Sensor Circuit

P0536

A/C Evaporator Temperature Sensor Circuit Range/Performance

P0537

A/C Evaporator Temperature Sensor Circuit Low

P0538

A/C Evaporator Temperature Sensor Circuit High

P0539

A/C Evaporator Temperature Sensor Circuit Intermittent

P0540

​Intake Air Heater A Circuit

P0541

Intake Air Heater A Circuit Low

P0542

​Intake Air Heater A Circuit High

P0543

Intake Air Heater A Circuit Open

P0544

​Exhaust Gas Temperature Sensor Circuit - Bank 2 Sensor 1

P0545

Exhaust Gas Temperature Sensor Circuit Low - Bank 2 Sensor 1

P0546

Exhaust Gas Temperature Sensor Circuit High - Bank 2 Sensor 1

P0547

​Exhaust Gas Temperature Sensor Circuit - Bank 2 Sensor 1

P0548

Exhaust Gas Temperature Sensor Circuit Low - Bank 2 Sensor 1


P0549

Exhaust Gas Temperature Sensor Circuit High - Bank 2 Sensor 1

P0550

Power Steering Pressure Sensor Circuit Malfunction

P0551

Power Steering Pressure Sensor Circuit Range/Performance

P0552

Power Steering Pressure Sensor Circuit Low Input

P0553

​Power Steering Pressure Sensor Circuit High Input

P0554

​Power Steering Pressure sensor Circuit Intermittent

P0555

​Brake Booster Pressure Sensor Circuit

P0556

Brake Booster Pressure Sensor Circuit Range/Performance

P0557

Brake Booster Pressure Sensor Circuit Low Input

P0558

Brake Booster Pressure Sensor Circuit High Input

P0559

Brake Booster Pressure Sensor Circuit Intermittent

P0560

System Voltage Malfunction

P0561

System Voltage Unstable

P0562

​System Voltage Low

P0563

System Voltage High

P0564

Cruise Control Multi-Function Input A Circuit

P0565

​Cruise Control On Signal Malfunction

P0566