P017FEVAP System Leak Detection Pump Module Air Filter Restricted
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Leak detection pump modules in the evaporative emission system (for example Bosch's DM-TL, used by VW, BMW, Porsche, Volvo, Mini, Land Rover and Kia/Hyundai) draw fresh air through their own filter, often mounted separately via a hose; at rest the charcoal canister is also vented through it. P017F means this filter is restricted – by dust, mud or water when fitted near a wheel arch. The reference measurement of the pump and the venting are then distorted, and the tank can pull a vacuum. A GM patent describes detection via the pressure difference across the filter during purge (above about 8 inH2O for 10–20 s). No manufacturer document using exactly this code was found; the description rests on CARB's requirement to monitor evaporative system components and these component sources.
- What you may notice
- Check engine light on
- EVAP readiness not set
- Possibly refuelling difficulties (venting)
- Usually no noticeable change in driving
- Likely causes
- LikelyLeak detection pump filter dirty or blocked
- PossibleMoisture or ice in filter or hose
- PossibleHose between filter and pump kinked or blocked
- RarePump module faulty (wrong reference)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.