PowertrainP0506
CautionSeverity: Caution - get it checked when you can
Idle Air Control System RPM Lower Than Expected
Key terms: SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
This range covers vehicle speed, idle and oil-pressure control, charging-system voltage, and brake-switch circuits.
2Common causes
- Carbon build-up in the throttle body
- Faulty idle air control valve
- Faulty vehicle speed sensor
- Faulty charging system or weak battery
- Wiring or connector fault
3Can I drive?
Codes in this range include oil-pressure, brake-switch and charging-system voltage faults. If the oil-pressure warning light is on, stop the engine as soon as it is safe and do not drive until it is diagnosed. If the battery or charging warning light is on, drive straight to a workshop: the car can stall when the battery runs flat. For any other P05 code, have the car diagnosed promptly rather than continuing to drive.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 37
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P0506 | Idle Air Control System RPM Lower Than Expected SAE | Powertrain |
| BAIC Motor | P0506 | Idle speed too low Brand | Powertrain |
| Mercedes-Benz | P0506 | Idle Air Control System RPM Lower Than Expected SAE | Powertrain |
| BMW | P0506 | Idle Control Syst. RPM Lower Than Expected Brand | Powertrain |
| BYD | P0506 | Idle speed too low Brand | Powertrain |
| Chery | P0506 | Idle speed low Brand | Powertrain |
| Daewoo | P0506 | Idle Speed Error Brand | Powertrain |
| DFFS | P0506 | Idle speed too low Brand | Powertrain |
| DFFX | P0506 | Idle speed too low Brand | Powertrain |
| DFXK | P0506 | Idle Air Control System RPM Lower Than Expected SAE | Powertrain |
| EOBD | P0506 | Idle Air Control System RPM Lower Than Expected SAE | Powertrain |
| Geely | P0506 | Idle Speed Too Low Brand | Powertrain |
| GM | P0506 | Idle Air Control System RPM Lower Than Expected SAE | Powertrain |
| Great Wall | P0506 | Idle speed too low Brand | Powertrain |
| Hafei | P0506 | IAC RPM lower than expected Brand | Powertrain |
| Holden | P0506 | Idle Speed Low Brand | Powertrain |
| Honda | P0506 | Idle Air Control System RPM Lower Than Expected SAE | Powertrain |
| Hyundai | P0506 | Idle Air Control System RPM Lower Than Expected SAE | Powertrain |
| Isuzu | P0506 | Idle Air Control System RPM Lower Than Expected SAE | Powertrain |
| Land Rover | P0506 | Inlet air control duty cycle lower than expected Brand | Powertrain |
| Mahindra | P0506 | Idle Air Control System RPM Lower Than Expected SAE | Powertrain |
| Maserati | P0506 | Idle speed performance lower than expected Brand | Powertrain |
| Mitsubishi | P0506 | IAC RPM lower than expected Brand | Powertrain |
| Opel | P0506 | Idle speed low Brand | Powertrain |
| Peugeot | P0506 | Idle Air Control System RPM Lower Than Expected SAE | Powertrain |
| Porsche | P0506 | Idle Air Control System RPM Lower Than Expected SAE | Powertrain |
| Proton | P0506 | IAC RPM lower than expected Brand | Powertrain |
| Saab | P0506 | Minimo basso Brand | Powertrain |
| MG (SAIC) | P0506 | Idle Control System RPM Lower than Expected Brand | Powertrain |
| Smart | P0506 | Idle Air Control System RPM Lower Than Expected SAE | Powertrain |
| Subaru | P0506 | Idle Control System RPM Lower than Expected Brand | Powertrain |
| Suzuki | P0506 | Idle air control system RPM lower than expected Brand | Powertrain |
| SWM Motor | P0506 | Idle speed too low Brand | Powertrain |
| Tata | P0506 | Low Intake Air Flow Brand | Powertrain |
| Toyota | P0506 | Idle speed too low Brand | Powertrain |
| Volvo | P0506 | Idle Air Control Underspeed Error Brand | Powertrain |
| Volkswagen | P0506 | Idle control system: RPM lower than expected; Short to ground Brand | Powertrain |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 2
These 7-character codes are manufacturer-specific variants of P0506 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P050600 | Die Leerlaufdrehzahl ist bei warmem Verbrennungsmotor zu niedrig. Brand | Powertrain |
| SsangYong | P050600 | Idle air control system - RPM lower than expected Brand | Powertrain |
6Related codes
Browse Pxxx codes or P050xx codes.