P2406EVAP System Leak Detection Pump Sense Circuit High
- 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
- P2406 is the mirror image of P2405: the pump feedback reads above its allowed range, as with a short to a voltage source or a sense line that floats high. Thresholds are not published. Jaguar's JTB00436 for the XJ (X351) includes P2406 among DMTL faults caused by water or ice from tyre spray caught in the pump filter and has the canister and filler pipe renewed. Maserati's DMTL sheet MAS002203 and Land Rover's SSM69118/SSM71298 list it as well, and JLR's 2021 bulletin JLRTB02068NAS1 (Range Rover, Discovery, Range Rover Sport) replaces the pump with a new dust filter cover after contamination. It differs from P2404 in that the signal leaves its electrical range instead of merely being implausible. Driving is unaffected.
- What you may notice
- Check engine light
- Fault often appears after wet or freezing weather
- Likely causes
- LikelyWater or ice from road spray in the pump filter (Jaguar XJ)
- PossibleSense wire shorted to a voltage feed or open ground at the pump
- PossiblePump damaged by contamination entering through the dust filter
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.