This section covers OBD-II codes P0500 to P0599, which are primarily related to Vehicle or idle speed control.

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DTCDescription
P0500Vehicle Speed Sensor “A” Malfunction
P0501Vehicle Speed Sensor “A” Range/Performance
P0502Vehicle Speed Sensor “A” Low Input
P0503Vehicle Speed Sensor “A” Intermittent/Erratic/High
P0504Brake Switch “A”/”B” Correlation
P0505Idle Control System Malfunction
P0506Idle Control System RPM Lower Than Expected
P0507Idle Control System RPM Higher Than Expected
P0508Idle Air Control System Circuit Low
P0509Idle Air Control System Circuit High
P050ACold Start Idle Air Control System Performance
P050BCold Start Ignition Timing Performance
P050CCold Start Engine Coolant Temperature Performance
P050DCold Start Rough Idle
P050ECold Start Engine Exhaust Temperature Too Low
P050FBrake Assist Vacuum Too Low
P0510Closed Throttle Position Switch Malfunction
P0511Idle Air Control Circuit
P0512Starter Request Circuit
P0513Incorrect Immobilizer Key
P0514Battery Temperature Sensor Circuit Range/Performance
P0515Battery Temperature Sensor Circuit
P0516Battery Temperature Sensor Circuit Low
P0517Battery Temperature Sensor Circuit High
P0518Idle Air Control Circuit Intermittent
P0519Idle Air Control System Performance
P051ACrankcase Pressure Sensor Circuit
P051BCrankcase Pressure Sensor Circuit Range/Performance
P051CCrankcase Pressure Sensor Circuit Low
P051DCrankcase Pressure Sensor Circuit High
P051ECrankcase Pressure Sensor Circuit Intermittent/Erratic
P051FPositive Crankcase Ventilation Filter Restriction
P0520Engine Oil Pressure Sensor/Switch Circuit Malfunction
P0521Engine Oil Pressure Sensor/Switch Circuit Range/Performance
P0522Engine Oil Pressure Sensor/Switch Circuit Low Voltage
P0523Engine Oil Pressure Sensor/Switch Circuit High Voltage
P0524Engine Oil Pressure Too Low
P0525Cruise Control Servo Control Circuit Range/Performance
P0526Fan Speed Sensor Circuit
P0527Fan Speed Sensor Circuit Range/Performance
P0528Fan Speed Sensor Circuit No Signal
P0529Fan Speed Sensor Circuit Intermittent
P052ACold Start “A” Camshaft Position Timing Over-Advanced Bank 1
P052BCold Start “A” Camshaft Position Timing Over-Retarded Bank 1
P052CCold Start “A” Camshaft Position Timing Over-Advanced Bank 2
P052DCold Start “A” Camshaft Position Timing Over-Retarded Bank 2
P052EPositive Crankcase Ventilation Regulator Valve Performance
P0530A/C Refrigerant Pressure Sensor “A” Circuit
P0531A/C Refrigerant Pressure Sensor “A” Circuit Range/Performance
P0532A/C Refrigerant Pressure Sensor “A” Circuit Low
P0533A/C Refrigerant Pressure Sensor “A” Circuit High
P0534Air Conditioner Refrigerant Charge Loss
P0535A/C Evaporator Temperature Sensor Circuit
P0536A/C Evaporator Temperature Sensor Circuit Range/Performance
P0537A/C Evaporator Temperature Sensor Circuit Low
P0538A/C Evaporator Temperature Sensor Circuit High
P0539A/C Evaporator Temperature Sensor Circuit Intermittent
P053APositive Crankcase Ventilation Heater Control Circuit/Open
P053BPositive Crankcase Ventilation Heater Control Circuit Low
P053CPositive Crankcase Ventilation Heater Control Circuit High
P0540Intake Air Heater “A” Circuit
P0541Intake Air Heater “A” Circuit Low
P0542Intake Air Heater “A” Circuit High
P0543Intake Air Heater “A” Circuit Open
P0544Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 1)
P0545Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 1)
P0546Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 1)
P0547Exhaust Gas Temperature Sensor Circuit (Bank 2 Sensor 1)
P0548Exhaust Gas Temperature Sensor Circuit Low (Bank 2 Sensor 1)
P0549Exhaust Gas Temperature Sensor Circuit High (Bank 2 Sensor 1)
P054ACold Start “B” Camshaft Position Timing Over-Advanced Bank 1
P054BCold Start “B” Camshaft Position Timing Over-Retarded Bank 1
P054CCold Start “B” Camshaft Position Timing Over-Advanced Bank 2
P054DCold Start “B” Camshaft Position Timing Over-Retarded Bank 2
P0550Power Steering Pressure Sensor Circuit Malfunction
P0551Power Steering Pressure Sensor Circuit Range/Performance
P0552Power Steering Pressure Sensor Circuit Low Input
P0553Power Steering Pressure Sensor Circuit High Input
P0554Power Steering Pressure Sensor Circuit Intermittent
P0555Brake Booster Pressure Sensor Circuit
P0556Brake Booster Pressure Sensor Circuit Range/Performance
P0557Brake Booster Pressure Sensor Circuit Low
P0558Brake Booster Pressure Sensor Circuit High
P0559Brake Booster Pressure Sensor Circuit Intermittent
P0560System Voltage Malfunction
P0561System Voltage Unstable
P0562System Voltage Low
P0563System Voltage High
P0564Cruise Control Multi-Function Input “A” Circuit
P0565Cruise Control On Signal Malfunction
P0566Cruise Control Off Signal Malfunction
P0567Cruise Control Resume Signal Malfunction
P0568Cruise Control Set Signal Malfunction
P0569Cruise Control Coast Signal Malfunction
P0570Cruise Control Accel Signal Malfunction
P0571Cruise Control/Brake Switch A Circuit Malfunction
P0572Cruise Control/Brake Switch A Circuit Low
P0573Cruise Control/Brake Switch A Circuit High
P0574Cruise Control System – Vehicle Speed Too High
P0575Cruise Control Input Circuit
P0576Cruise Control Input Circuit Low
P0577Cruise Control Input Circuit High
P0578Cruise Control Multi-Function Input “A” Circuit Stuck
P0579Cruise Control Multi-Function Input “A” Circuit Range/Performance
P0580Cruise Control Multi-Function Input “A” Circuit Low
P0581Cruise Control Multi-Function Input “A” Circuit High
P0582Cruise Control Vacuum Control Circuit/Open
P0583Cruise Control Vacuum Control Circuit Low
P0584Cruise Control Vacuum Control Circuit High
P0585Cruise Control Multi-Function Input “A”/”B” Correlation
P0586Cruise Control Vent Control Circuit/Open
P0587Cruise Control Vent Control Circuit Low
P0588Cruise Control Vent Control Circuit High
P0590Cruise Control Multi-Function Input “B” Circuit Stuck
P0591Cruise Control Multi-Function Input “B” Circuit Range/Performance
P0592Cruise Control Multi-Function Input “B” Circuit Low
P0593Cruise Control Multi-Function Input “B” Circuit High
P0594Cruise Control Servo Control Circuit/Open
P0595Cruise Control Servo Control Circuit Low
P0596Cruise Control Servo Control Circuit High
P0597Thermostat Heater Control Circuit/Open
P0598Thermostat Heater Control Circuit Low
P0599Thermostat Heater Control Circuit High