Speed/Idle Codes
131 OBD-II diagnostic trouble codes in this category.
Showing page 1 of 2 (131 codes total)
| Code | Description | Subsystem | Severity |
|---|---|---|---|
| P0297 | Vehicle Overspeed Condition | Vehicle Speed | Critical |
| P0500 | Vehicle Speed Sensor Malfunction | Vehicle Speed | Medium |
| P0501 | Vehicle Speed Sensor Range/Performance | Vehicle Speed | Medium |
| P0502 | Vehicle Speed Sensor Low Input | Vehicle Speed | Medium |
| P0503 | Vehicle Speed Sensor Intermittent/Erratic/High | Vehicle Speed | Medium |
| P0504 | Brake Switch A/B Correlation | Brake Switch | Medium |
| P0505 | Idle Control System Malfunction | Idle Control | Medium |
| P0506 | Idle Control System RPM Lower Than Expected | Idle Control | Medium |
| P0507 | Idle Control System RPM Higher Than Expected | Idle Control | Medium |
| P0508 | Idle Air Control System Circuit Low | Idle Control | Medium |
| P0509 | Idle Air Control System Circuit High | Idle Control | Medium |
| P0510 | Closed Throttle Position Switch | Throttle System | Medium |
| P0511 | Idle Air Control Circuit | Idle Control | Medium |
| P0518 | Idle Air Control Circuit Intermittent | Idle Control | Medium |
| P0519 | Idle Air Control System Performance | Idle Control | Medium |
| P0520 | Engine Oil Pressure Sensor/Switch Circuit | Oil Pressure | High |
| P0521 | Engine Oil Pressure Sensor/Switch Range/Performance | Oil Pressure | High |
| P0522 | Engine Oil Pressure Sensor/Switch Low | Oil Pressure | Critical |
| P0523 | Engine Oil Pressure Sensor/Switch High | Oil Pressure | Medium |
| P0524 | Engine Oil Pressure Too Low | Oil Pressure | Critical |
| P0525 | Cruise Control Servo Control Circuit Range/Performance | Cruise Control | Low |
| P0526 | Cooling Fan Speed Sensor Circuit | Cooling Fan | Medium |
| P0527 | Cooling Fan Speed Sensor Circuit Range/Performance | Cooling Fan | Medium |
| P0528 | Cooling Fan Speed Sensor Circuit No Signal | Cooling Fan | High |
| P0529 | Cooling Fan Speed Sensor Circuit Intermittent | Cooling Fan | Low |
| P0530 | A/C Refrigerant Pressure Sensor Circuit | A/C System | Medium |
| P0531 | A/C Refrigerant Pressure Sensor Circuit Range/Performance | A/C System | Medium |
| P0532 | A/C Refrigerant Pressure Sensor Circuit Low Input | A/C System | Medium |
| P0533 | A/C Refrigerant Pressure Sensor Circuit High Input | A/C System | Medium |
| P0534 | A/C Refrigerant Charge Loss | A/C System | Medium |
| P0535 | A/C Evaporator Temperature Sensor Circuit | A/C System | Low |
| P0536 | A/C Evaporator Temperature Sensor Circuit Range/Performance | A/C System | Low |
| P0537 | A/C Evaporator Temperature Sensor Circuit Low | A/C System | Medium |
| P0538 | A/C Evaporator Temperature Sensor Circuit High | A/C System | Medium |
| P0539 | A/C Evaporator Temperature Sensor Circuit Intermittent | A/C System | Low |
| P0550 | Power Steering Pressure Sensor/Switch Circuit | Power Steering | Medium |
| P0551 | Power Steering Pressure Sensor/Switch Circuit Range/Performance | Power Steering | Low |
| P0552 | Power Steering Pressure Sensor/Switch Circuit Low Input | Power Steering | Medium |
| P0553 | Power Steering Pressure Sensor/Switch Circuit High Input | Power Steering | Low |
| P0554 | Power Steering Pressure Sensor/Switch Circuit Intermittent | Power Steering | Low |
| P0555 | Brake Booster Pressure Sensor Circuit | Speed/Idle Control | Medium |
| P0556 | Brake Booster Pressure Sensor Circuit Range/Performance | Speed/Idle Control | Medium |
| P0557 | Brake Booster Pressure Sensor Circuit Low | Speed/Idle Control | Medium |
| P0558 | Brake Booster Pressure Sensor Circuit High | Speed/Idle Control | Medium |
| P0559 | Brake Booster Pressure Sensor Circuit Intermittent | Speed/Idle Control | Medium |
| P0562 | System Voltage Low | Charging System | Medium |
| P0563 | System Voltage High | Charging System | Medium |
| P0564 | Cruise Control Multi-Function Input A Circuit | Cruise Control | Low |
| P0565 | Cruise Control On Signal | Cruise Control | Low |
| P0566 | Cruise Control Off Signal | Cruise Control | Medium |
| P0567 | Cruise Control Resume Signal | Cruise Control | Low |
| P0568 | Cruise Control Set Signal | Cruise Control | Low |
| P0569 | Cruise Control Coast Signal | Cruise Control | Low |
| P0570 | Cruise Control Accel Signal | Cruise Control | Low |
| P0571 | Cruise Control/Brake Switch A Circuit | Cruise Control | Medium |
| P0572 | Cruise Control/Brake Switch A Circuit Low | Cruise Control | Medium |
| P0573 | Cruise Control/Brake Switch A Circuit High | Cruise Control | High |
| P0574 | Cruise Control System Vehicle Speed Too High | Cruise Control | Medium |
| P0575 | Cruise Control Input Circuit | Cruise Control | Low |
| P0576 | Cruise Control Input Circuit Low | Cruise Control | Low |
| P0577 | Cruise Control Input Circuit High | Cruise Control | Low |
| P0578 | Cruise Control Multi-Function Input A Circuit Stuck | Cruise Control | Medium |
| P0579 | Cruise Control Multi-Function Input A Circuit Range/Performance | Cruise Control | Low |
| P0580 | Cruise Control Multi-Function Input A Circuit Low | Cruise Control | Medium |
| P0581 | Cruise Control Multi-Function Input A Circuit High | Cruise Control | Low |
| P0582 | Cruise Control Vacuum Control Circuit/Open | Cruise Control | Low |
| P0583 | Cruise Control Vacuum Control Circuit Low | Cruise Control | Low |
| P0584 | Cruise Control Vacuum Control Circuit High | Cruise Control | Low |
| P0585 | Cruise Control Multi-Function Input A/B Correlation | Cruise Control | Low |
| P0586 | Cruise Control Vent Control Circuit/Open | Cruise Control | Low |
| P0587 | Cruise Control Vent Control Circuit Low | Cruise Control | Low |
| P0588 | Cruise Control Vent Control Circuit High | Cruise Control | Low |
| P0589 | Cruise Control Multi-Function Input B Circuit | Cruise Control | Low |
| P0590 | Cruise Control Multi-Function Input B Circuit Stuck | Cruise Control | Medium |
| P0591 | Cruise Control Multi-Function Input B Circuit Range/Performance | Cruise Control | Low |
| P0592 | Cruise Control Multi-Function Input B Circuit Low | Cruise Control | Medium |
| P0593 | Cruise Control Multi-Function Input B Circuit High | Cruise Control | Low |
| P0594 | Cruise Control Servo Control Circuit/Open | Cruise Control | Medium |
| P0595 | Cruise Control Servo Control Circuit Low | Cruise Control | Medium |
| P0596 | Cruise Control Servo Control Circuit High | Cruise Control | Medium |
| P05E2 | A/C Refrigerant Pressure Sensor B Circuit Intermittent/Erratic | A/C System | Medium |
| P1039 | Vehicle Speed Signal Missing or Improper (Ford) | Vehicle Speed | Medium |
| P1103 | Mass Air Flow Sensor Signal Inconsistent With Engine Speed (Mazda) | Vehicle Speed | Medium |
| P1294 | Target Idle Not Reached (Dodge) | Idle Control | Medium |
| P1339 | Crankshaft Position Engine Speed Sensor Cross Connected (Volkswagen) | Vehicle Speed | Medium |
| P1390 | Wheel Speed Sensor 1, G-Sensor Circuit (Buick) | Vehicle Speed | Medium |
| P1392 | Wheel Speed Sensor 1, G-Sensor Circuit Low Voltage (Buick) | Vehicle Speed | Medium |
| P1393 | Wheel Speed Sensor 1, G-Sensor Circuit High Voltage (Buick) | Vehicle Speed | Medium |
| P1394 | Wheel Speed Sensor 1, G-Sensor Circuit Intermittent (Buick) | Vehicle Speed | Medium |
| P1395 | Wheel Speed Sensor 2, G-Sensor Circuit (Buick) | Vehicle Speed | Medium |
| P1398 | Wheel Speed Sensor 2, G-Sensor Circuit High Voltage (Buick) | Vehicle Speed | Medium |
| P1487 | Hi Speed Rad Fan CTRL Relay Circuit Open Or Shorted (Dodge) | Vehicle Speed | High |
| P1489 | High Speed Fan CTRL Relay Circuit Open Or Shorted (Dodge) | Vehicle Speed | High |
| P1490 | Low Speed Fan CTRL Relay Circuit Open Or Shorted (Dodge) | Vehicle Speed | High |
| P1500 | Idle Speed Control Valve Stuck Open (Bmw) | Idle Control | Medium |
| P1501 | Idle Speed Control Valve Stuck Closed (Bmw) | Idle Control | Medium |
| P1502 | Idle Speed Control Valve Closing Solenoid Control Circuit Signal High Or Low (Bmw) | Idle Control | Medium |
| P1503 | Idle Speed Control Valve Closing Solenoid Control Circuit Signal Low (Bmw) | Idle Control | Medium |
| P1504 | Idle Speed Control Valve Closing Solenoid Control Open Circuit (Bmw) | Idle Control | High |
| P1505 | Idle Speed Control Valve Closing Solenoid Control Circuit Electrical (Bmw) | Idle Control | Medium |
About Speed/Idle Codes
This page lists all 131 OBD-II diagnostic trouble codes classified under the Speed/Idle category. These codes are stored by your vehicle's onboard computer when a sensor detects a malfunction in the speed/idle system. Each code begins with a letter indicating the system (P for Powertrain, B for Body, C for Chassis, U for Network) followed by four digits that identify the specific fault.
When your check engine light comes on, an OBD-II scanner reads these stored codes to help pinpoint the problem. Generic codes (where the second digit is 0) follow the SAE J2012 standard and mean the same thing on every vehicle. Manufacturer-specific codes (where the second digit is 1) may have different meanings depending on the vehicle brand.
Click any code in the table above to see its full description, possible causes, common symptoms, and step-by-step repair guidance. Use the search box to quickly find a specific code within this category.