P2405 code meaning
EVAP System Leak Detection Pump Sense Circuit Low
Powertrain system Generic code P24xx codes Check engine light
What P2405 means
P2405 is set when the feedback signal of the leak detection pump stays below its permitted window, typically from a short to ground on the sense line or a fault inside the pump. No public source states a voltage threshold for this code. It appears in Maserati's sheet MAS002203 (2020) for DMTL-equipped M156/M157/M161 gasoline models from MY17, which notes that most DMTL checks run with the key off; Land Rover's SSM69118 and SSM71298 treat a confirmed P2405 as a defect within the DMTL pump, and the 2021 bulletin JLRTB02068NAS1 blames dirt entering through the pump's dust filter and replaces pump and filter cover. P2406 is the high-side counterpart, P2403 a missing signal. The car drives normally, but the EVAP test result is lost.
P2405 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P2405
- Check engine light, possibly set while the car is parked
- No effect on drivability
Common causes of P2405
- Most likelyInternal DMTL pump fault, often after dirt ingress through the dust filter
- PossibleSense wire shorted to ground
- Less likelyCorroded connector at the pump mounted near the rear wheel arch
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 P2405 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). |
| 05 | The exact fault in that area. |
What to do next
- Note P2405 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 P2405
What does P2405 mean?
P2405 means "EVAP System Leak Detection Pump Sense Circuit Low". P2405 is set when the feedback signal of the leak detection pump stays below its permitted window, typically from a short to ground on the sense line or a fault inside the pump. It is a generic code, so it means the same on every make.
Is it safe to drive with P2405?
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 P2405 fail an emissions test?
Yes, it can. P2405 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 P2405 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will P2405 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.