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Vehicle Speed / Idle Control / Aux Inputs Trouble Codes
Diagnostic codes categorized under the Vehicle Speed / Idle Control / Aux Inputs powertrain subsystem. These relate directly to circuits, sensors, or mechanics within this assembly.
Subsystem Index (512 codes)
| DTC | Description |
|---|---|
| P0500 | Vehicle Speed Sensor A Circuit |
| P0501 | Vehicle Speed Sensor A Circuit Range/Performance |
| P0502 | Vehicle Speed Sensor A Circuit Low |
| P0503 | Vehicle Speed Sensor A Circuit Intermittent/Erratic/High |
| P0504 | Brake Switch A/B Correlation |
| P0505 | Idle Control System |
| 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 |
| P050A | Cold Start Idle Control System Performance |
| P050B | Cold Start Ignition Timing Performance |
| P050C | Cold Start Engine Coolant Temperature Performance |
| P050D | Cold Start Rough Idle |
| P050E | Cold Start Engine Exhaust Temperature Too Low |
| P050F | Brake Assist Vacuum Too Low |
| P0510 | Closed Throttle Position Switch |
| 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 System Performance |
| P051A | Crankcase Pressure Sensor A Circuit |
| P051B | Crankcase Pressure Sensor A Circuit Range/Performance |
| P051C | Crankcase Pressure Sensor A Circuit Low |
| P051D | Crankcase Pressure Sensor A Circuit High |
| P051E | Crankcase Pressure Sensor A Circuit Intermittent/Erratic |
| P051F | PCV Filter Restriction |
| P0520 | Engine Oil Pressure Sensor/Switch A Circuit |
| P0521 | Engine Oil Pressure Sensor/Switch A Range/Performance |
| P0522 | Engine Oil Pressure Sensor/Switch A Low |
| P0523 | Engine Oil Pressure Sensor/Switch A High |
| 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 |
| P052A | Cold Start A Camshaft Position Timing Over-Advanced Bank 1 |
| P052B | Cold Start A Camshaft Position Timing Over-Retarded Bank 1 |
| P052C | Cold Start A Camshaft Position Timing Over-Advanced Bank 2 |
| P052D | Cold Start A Camshaft Position Timing Over-Retarded Bank 2 |
| P052E | PCV Regulator Valve Performance |
| P052F | Glow Plug Control Module 1 System Voltage |
| P0530 | A/C Refrigerant Pressure Sensor A Circuit |
| P0531 | A/C Refrigerant Pressure Sensor A Circuit Range/Performance |
| P0532 | A/C Refrigerant Pressure Sensor A Circuit Low |
| P0533 | A/C Refrigerant Pressure Sensor A Circuit High |
| P0534 | A/C 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 |
| P053A | PCV Heater A Control Circuit /Open |
| P053B | PCV Heater A Control Circuit Low |
| P053C | PCV Heater A Control Circuit High |
| P053D | PCV Heater A Performance |
| P053E | Crankcase Pressure Too High |
| P053F | Cold Start Fuel Pressure Performance Bank 1 |
| 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 1 Sensor 1 |
| P0545 | Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 1 |
| P0546 | Exhaust Gas Temperature Sensor Circuit High Bank 1 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 |
| P054A | Cold Start B Camshaft Position Timing Over-Advanced Bank 1 |
| P054B | Cold Start B Camshaft Position Timing Over-Retarded Bank 1 |
| P054C | Cold Start B Camshaft Position Timing Over-Advanced Bank 2 |
| P054D | Cold Start B Camshaft Position Timing Over-Retarded Bank 2 |
| P054E | Idle Control System - Fuel Quantity Lower Than Expected |
| P054F | Idle Control System - Fuel Quantity Higher Than Expected |
| P0550 | Power Steering Pressure Sensor/Switch Circuit |
| P0551 | Power Steering Pressure Sensor/Switch Circuit Range/Performance |
| P0552 | Power Steering Pressure Sensor/Switch Circuit Low |
| P0553 | Power Steering Pressure Sensor/Switch Circuit High |
| P0554 | Power Steering Pressure Sensor/Switch Circuit Intermittent |
| P0555 | Brake Booster Pressure Sensor Circuit |
| P0556 | Brake Booster Pressure Sensor Circuit Range/Performance |
| P0557 | Brake Booster Pressure Sensor Circuit Low |
| P0558 | Brake Booster Pressure Sensor Circuit High |
| P0559 | Brake Booster Pressure Sensor Circuit Intermittent |
| P055A | Engine Oil Pressure Sensor/Switch B Circuit |
| P055B | Engine Oil Pressure Sensor/Switch B Range/Performance |
| P055C | Engine Oil Pressure Sensor/Switch B Low |
| P055D | Engine Oil Pressure Sensor/Switch B High |
| P055E | Oxygen Sensor Control Module System Voltage |
| P055F | Engine Oil Pressure Out of Range |
| P0560 | System Voltage |
| 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 |
| P0566 | Cruise Control Off Signal |
| P0567 | Cruise Control Resume Signal |
| P0568 | Cruise Control Set Signal |
| P0569 | Cruise Control Coast Signal |
| P056A | Cruise Control Increase Distance Signal |
| P056B | Cruise Control Decrease Distance Signal |
| P056C | Cruise Control Cancel Signal |
| P056D | Reductant Control Module System Voltage |
| P056E | Cold Start Turbocharger/Supercharger Boost Control A Performance |
| P056F | Cold Start Turbocharger/Supercharger Boost Control B Performance |
| P0570 | Cruise Control Accelerate Signal |
| P0571 | Brake Switch A Circuit |
| P0572 | Brake Switch A Circuit Low |
| P0573 | Brake Switch A Circuit High |
| P0574 | Cruise Control System - Vehicle Speed Too High |
| P0575 | Cruise Control Input Circuit |
| P0576 | Cruise Control Input Circuit Low |
| P0577 | Cruise Control Input Circuit High |
| P0578 | Cruise Control Multi-Function Input A Circuit Stuck |
| P0579 | Cruise Control Multi-Function Input A Circuit Range/Performance |
| P057A | Brake Pedal Position Sensor A Circuit/Open |
| P057B | Brake Pedal Position Sensor A Circuit Range/Performance |
| P057C | Brake Pedal Position Sensor A Circuit Low |
| P057D | Brake Pedal Position Sensor A Circuit High |
| P057E | Brake Pedal Position Sensor A Circuit Intermittent/Erratic |
| P057F | Battery A State of Charge Performance |
| P0580 | Cruise Control Multi-Function Input A Circuit Low |
| P0581 | Cruise Control Multi-Function Input A Circuit High |
| P0582 | Cruise Control Vacuum Control Circuit/Open |
| P0583 | Cruise Control Vacuum Control Circuit Low |
| P0584 | Cruise Control Vacuum Control Circuit High |
| P0585 | Cruise Control Multi-Function Input A/B Correlation |
| P0586 | Cruise Control Vent Control Circuit/Open |
| P0587 | Cruise Control Vent Control Circuit Low |
| P0588 | Cruise Control Vent Control Circuit High |
| P0589 | Cruise Control Multi-Function Input B Circuit |
| P058A | Battery Monitor Module Performance |
| P058B | Battery Monitor Module Current Monitoring Performance |
| P058C | Battery Monitor Module Temperature Monitoring Performance |
| P058D | Battery Monitor Module Voltage Monitoring Performance |
| P058E | Battery Monitor Module Temperature Too High |
| P058F | Battery Monitor Module Temperature Too Low |
| P0590 | Cruise Control Multi-Function Input B Circuit Stuck |
| P0591 | Cruise Control Multi-Function Input B Circuit Range/Performance |
| P0592 | Cruise Control Multi-Function Input B Circuit Low |
| P0593 | Cruise Control Multi-Function Input B Circuit High |
| P0594 | Cruise Control Servo Control Circuit/Open |
| P0595 | Cruise Control Servo Control Circuit Low |
| P0596 | Cruise Control Servo Control Circuit High |
| P0597 | Thermostat Heater Control Circuit/Open |
| P0598 | Thermostat Heater Control Circuit Low |
| P0599 | Thermostat Heater Control Circuit High |
| P059A | Active Grille Air Shutter A Position Sensor Circuit |
| P059B | Active Grille Air Shutter A Position Sensor Circuit Range/Performance |
| P059C | Active Grille Air Shutter A Position Sensor Circuit High |
| P059D | Active Grille Air Shutter A Position Sensor Circuit Low |
| P059E | Active Grille Air Shutter A Position Sensor Circuit Intermittent |
| P059F | Active Grille Air Shutter A Performance/Stuck Off |
| P05A0 | Active Grille Air Shutter A Stuck On |
| P05A1 | Active Grille Air Shutter A Position Sensor Minimum/Maximum Stop Performance |
| P05A2 | Active Grille Air Shutter A Control Circuit/Open |
| P05A3 | Active Grille Air Shutter A Control Circuit Range/Performance |
| P05A4 | Active Grille Air Shutter A Control Circuit High |
| P05A5 | Active Grille Air Shutter A Control Circuit Low |
| P05A6 | Active Grille Air Shutter A Supply Voltage Circuit/Open |
| P05A7 | Active Grille Air Shutter A Supply Voltage Circuit Low |
| P05A8 | Active Grille Air Shutter A Supply Voltage Circuit High |
| P05A9 | Active Grille Air Shutter B Position Sensor Circuit |
| P05AA | Active Grille Air Shutter B Position Sensor Circuit Range/Performance |
| P05AB | Active Grille Air Shutter B Position Sensor Circuit High |
| P05AC | Active Grille Air Shutter B Position Sensor Circuit Low |
| P05AD | Active Grille Air Shutter B Position Sensor Circuit Intermittent |
| P05AE | Active Grille Air Shutter B Performance/Stuck Off |
| P05AF | Active Grille Air Shutter B Stuck On |
| P05B0 | Active Grille Air Shutter B Position Sensor Minimum/Maximum Stop Performance |
| P05B1 | Active Grille Air Shutter B Control Circuit/Open |
| P05B2 | Active Grille Air Shutter B Control Circuit Range/Performance |
| P05B3 | Active Grille Air Shutter B Control Circuit High |
| P05B4 | Active Grille Air Shutter B Control Circuit Low |
| P05B5 | Active Grille Air Shutter B Supply Voltage Circuit/Open |
| P05B6 | Active Grille Air Shutter B Supply Voltage Circuit Low |
| P05B7 | Active Grille Air Shutter B Supply Voltage Circuit High |
| P05B8 | Restraint Deployment Signal Circuit/Open |
| P05B9 | Restraint Deployment Signal Circuit Low |
| P05BA | Restraint Deployment Signal Circuit High |
| P05BB | Restraints Deployed |
| P05BC | Stop-Start Mode Switch Circuit/Open |
| P05BD | Stop-Start Mode Switch Circuit Range/Performance |
| P05BE | Stop-Start Mode Switch Circuit Low |
| P05BF | Stop-Start Mode Switch Circuit High |
| P05C0 | Active Grille Air Shutter Module A Over Temperature |
| P05C1 | Active Grille Air Shutter Module B Over Temperature |
| P05C2 | Engine Coolant Pressure Sensor Circuit |
| P05C3 | Engine Coolant Pressure Sensor Circuit Range/Performance |
| P05C4 | Engine Coolant Pressure Sensor Circuit Low |
| P05C5 | Engine Coolant Pressure Sensor Circuit High |
| P05C6 | Engine Coolant Pressure Sensor Circuit Intermittent/Erratic |
| P05C7 | Economy Mode Switch Circuit/Open |
| P05C8 | Economy Mode Switch Circuit Range/Performance |
| P05C9 | Economy Mode Switch Circuit Low |
| P05CA | Economy Mode Switch Circuit High |
| P05CB | Vehicle Hardware Incompatibility |
| P05CC | Cold Start A Camshaft Position Timing Performance Bank 1 |
| P05CD | Cold Start A Camshaft Position Timing Performance Bank 2 |
| P05CE | Cold Start B Camshaft Position Timing Performance Bank 1 |
| P05CF | Cold Start B Camshaft Position Timing Performance Bank 2 |
| P05D0 | Driver Mode Select Switch A Circuit |
| P05D1 | Driver Mode Select Switch A Circuit Low |
| P05D2 | Driver Mode Select Switch A Circuit High |
| P05D3 | Driver Mode Select Switch A Range/Performance |
| P05D4 | Driver Mode Select Switch B Circuit |
| P05D5 | Driver Mode Select Switch B Circuit Low |
| P05D6 | Driver Mode Select Switch B Circuit High |
| P05D7 | Driver Mode Select Switch B Range/Performance |
| P05D8 | PCV Regulator Valve Control Circuit/Open |
| P05D9 | PCV Regulator Valve Control Circuit Low |
| P05DA | PCV Regulator Valve Control Circuit High |
| P05DB | Brake Pedal Position Sensor B Circuit/Open |
| P05DC | Brake Pedal Position Sensor B Circuit Range/Performance |
| P05DD | Brake Pedal Position Sensor B Circuit Low |
| P05DE | Brake Pedal Position Sensor B Circuit High |
| P05DF | Brake Pedal Position Sensor B Circuit Intermittent/Erratic |
| P05E0 | Brake Pedal Position Sensor A/B Correlation |
| P05E1 | A/C Refrigerant Pressure Sensor A Circuit Intermittent/Erratic |
| P05E2 | A/C Refrigerant Pressure Sensor B Circuit Intermittent/Erratic |
| P05E3 | Park Brake Sensor/Switch Circuit |
| P05E4 | Park Brake Sensor/Switch Circuit Low |
| P05E5 | Park Brake Sensor/Switch Circuit High |
| P05E6 | Park Brake Sensor/Switch Circuit Range/Performance |
| P05E7 | Park Brake Sensor/Switch Circuit Intermittent/Erratic |
| P05E8 | Engine Oil Bypass Valve Control Circuit/Open |
| P05E9 | Engine Oil Bypass Valve Control Circuit Low |
| P05EA | Engine Oil Bypass Valve Control Circuit High |
| P05EB | Cold Start SCR NOx Catalyst Inlet Temperature Too Low |
| P05EC | Cold Start Injection Timing Performance |
| P05ED | Reductant Heater Control Module Supply Voltage |
| P05EE | Reductant Pump Supply Voltage Circuit/Open |
| P05EF | Reductant Pump Supply Voltage Circuit Low |
| P05F0 | Reductant Pump Supply Voltage Circuit High |
| P05F1 | Reductant Pump Supply Voltage Circuit Stuck On |
| P05F2 | Reductant Pump Supply Voltage Circuit Stuck Off |
| P05F3 | Exhaust Aftertreatment Power Relay Control Circuit/Open |
| P05F4 | Exhaust Aftertreatment Power Relay Control Circuit Low |
| P05F5 | Exhaust Aftertreatment Power Relay Control Circuit High |
| P05F6 | Exhaust Aftertreatment Power Relay Control Circuit Stuck On |
| P05F7 | Exhaust Aftertreatment Power Relay Control Circuit Stuck Off |
| P05F8 | Reductant Heater Control Module Performance |
| P05F9 | Stop-Start Status Signal Circuit |
| P05FA | Stop-Start Status Signal Circuit Low |
| P05FB | Stop-Start Status Signal Circuit High |
| P05FC | Cold Start Fuel Pressure Performance Bank 2 |
| P05FD | Turbocharger/Supercharger Boost Control A Temperature Too High |
| P05FE | Active Grille Air Shutter C Performance/Stuck Off |
| P05FF | Brake Pressure Sensor / Brake Pedal Position Sensor Correlation |
| P2500 | Generator Lamp/L-Terminal Circuit Low |
| P2501 | Generator Lamp/L-Terminal Circuit High |
| P2502 | Charging System Voltage |
| P2503 | Charging System Voltage Low |
| P2504 | Charging System Voltage High |
| P2505 | ECM/PCM Power Input Signal |
| P2506 | ECM/PCM Power Input Signal Range/Performance |
| P2507 | ECM/PCM Power Input Signal Low |
| P2508 | ECM/PCM Power Input Signal High |
| P2509 | ECM/PCM Power Input Signal Intermittent |
| P250A | Engine Oil Level Sensor Circuit |
| P250B | Engine Oil Level Sensor Circuit Range/Performance |
| P250C | Engine Oil Level Sensor Circuit Low |
| P250D | Engine Oil Level Sensor Circuit High |
| P250E | Engine Oil Level Sensor Circuit Intermittent/Erratic |
| P250F | Engine Oil Level Too Low |
| P2510 | ECM/PCM Power Relay Sense Circuit Range/Performance |
| P2511 | ECM/PCM Power Relay Sense Circuit Intermittent |
| P2512 | Event Data Recorder Request Circuit/ Open |
| P2513 | Event Data Recorder Request Circuit Low |
| P2514 | Event Data Recorder Request Circuit High |
| P2515 | A/C Refrigerant Pressure Sensor B Circuit |
| P2516 | A/C Refrigerant Pressure Sensor B Circuit Range/Performance |
| P2517 | A/C Refrigerant Pressure Sensor B Circuit Low |
| P2518 | A/C Refrigerant Pressure Sensor B Circuit High |
| P2519 | A/C Request A Circuit |
| P251A | PTO Enable Switch Circuit/Open |
| P251B | PTO Enable Switch Circuit Low |
| P251C | PTO Enable Switch Circuit High |
| P251D | PTO Engine Shutdown Circuit/Open |
| P251E | PTO Engine Shutdown Circuit Low |
| P251F | PTO Engine Shutdown Circuit High |
| P2520 | A/C Request A Circuit Low |
| P2521 | A/C Request A Circuit High |
| P2522 | A/C Request B Circuit |
| P2523 | A/C Request B Circuit Low |
| P2524 | A/C Request B Circuit High |
| P2525 | Vacuum Reservoir Pressure Sensor Circuit |
| P2526 | Vacuum Reservoir Pressure Sensor Circuit Range/Performance |
| P2527 | Vacuum Reservoir Pressure Sensor Circuit Low |
| P2528 | Vacuum Reservoir Pressure Sensor Circuit High |
| P2529 | Vacuum Reservoir Pressure Sensor Circuit Intermittent |
| P252A | Engine Oil Quality Sensor Circuit |
| P252B | Engine Oil Quality Sensor Circuit Range/Performance |