P2406 code meaning
EVAP System Leak Detection Pump Sense Circuit High
Powertrain system Generic code P24xx codes Check engine light
What P2406 means
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 tire 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.
P2406 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P2406
- Check engine light
- Fault often appears after wet or freezing weather
Common causes of P2406
- Most 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
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EVAP leak detection pumpEVAP pump wiring
What each part of P2406 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 06 | The exact fault in that area. |
What to do next
- Note P2406 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2406
What does P2406 mean?
P2406 means "EVAP System Leak Detection Pump Sense Circuit High". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2406?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2406 fail an emissions test?
Yes, it can. P2406 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2406 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P2406 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.