Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0506Idle Speed Performance Lower Than Expected
P0506-00Idle Control System RPM - Lower Than Expected
P0506Idle Speed Performance Lower Than Expected
Manufacturer communications
85Original wording in English
AUDI
This bulletin provides information when the MIL is on; DTC P050600 with Symptom 4008 stored in ECM V6 TFSI.
RAM
Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0088-00 - Fuel Rail Pressure Too High - Bank 1. ● P208B-00 - Reductant Pump 1 Control Performance. ● P…
RAM
Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0088-00 - Fuel Rail Pressure Too High - Bank 1. ● P208B-00 - Reductant Pump 1 Control Performance. ● P…
HYUNDAI
Some Santa Fe (MX5A) and Santa Cruz (NXT) vehicles may exhibit a low idle or excessive vibration while in Drive or Reverse, or DTC P050600 (Idle Air Control System – RPM Lower than Expected) caused by the one-way clutch sprags being misaligned. This bulletin provides instructions to remove the automatic transmission and replace …
Check vehicle applicability
185A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Audi | A5 ↗ | 2025 |
| Audi | A6 ↗ | 2026 |
| Audi | Q5 ↗ | 2025 |
| Audi | Q5 SPORTBACK ↗ | 2025 |
| Audi | S5 ↗ | 2025 |
| Audi | SQ5 ↗ | 2025 |
| Audi | SQ5 SPORTBACK ↗ | 2025 |
| Buick | ENCLAVE ↗ | 2018 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Idle Control System RPM lower Than Expected
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.