Scanline › Fault codes › Idle
P0506Idle control system RPM lower than expected
P0506 means “Idle control system RPM lower than expected”. It's a generic powertrain code (vehicle speed, idle control and auxiliary inputs), so it means the same on every make, including VW, Škoda, Audi, SEAT and Cupra.
- Not urgent
- SystemIdle
- TypeGeneric (same on all makes)
- VCDS number16890
How urgent is it?
Usually not urgent; often emissions-related.
Which system and module
Scanline files it under Idle. The first letter, P, means powertrain (engine, transmission, emissions).
Usually stored by the engine control unit (VCDS address 01, Engine).
What usually causes it
- Dirty throttle body
- intake restriction
Typical causes are a starting point, not a diagnosis of your car.
Related codes
Got this code on your car?
Paste your whole scan into Scanline to see which faults are current and which are old news. It runs in your browser; nothing is uploaded.
Open ScanlineScanline explains fault codes; it isn't a repair authority. This page explains what the code means; it can't tell you what is wrong with your car. Ross-Tech's wiki has their own notes on VW Group faults.