P240AEVAP System Leak Detection Pump Heater Control Circuit/Open
- 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
- Some leak detection pump modules, such as the DMTL units on VW, Jaguar Land Rover and Maserati petrol engines, carry a small heating element that keeps moisture and ice from upsetting the pump and its pressure measurement. P240A is set when the heater's drive circuit appears open. The 2014 data books for the VW Golf and Touareg take a heater-line voltage of about 4.7-5.4 V as the criterion. Jaguar's JTB00436 for the XJ lists P240A next to other DMTL codes that water or ice in the pump filter can cause, and Land Rover's SSM69118 and SSM71298 cover it as well. P240B and P240C are the short-circuit siblings; P2400 concerns the pump drive itself. Without heating the leak test may become unreliable in cold, damp weather.
- What you may notice
- Check engine light
- Further EVAP pump codes in cold or wet conditions
- Likely causes
- LikelyBurnt-out heating element inside the pump module
- PossibleBroken heater wire or corroded terminal at the module connector
- RareMissing supply voltage to the heater (fuse, relay)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.