P2400 EVAP leak detection pump control circuit/open
What P2400 means
Some cars use an electric leak detection pump to pressurise the fuel vapour (EVAP) system and check it for leaks. P2400 means the engine computer found an open circuit in the pump's control circuit. The EVAP leak test cannot run, but the engine is not affected.
P2400 is a generic SAE J2012 code: it means the same on every make. The exact cause still depends on the car, so read the freeze-frame data before replacing parts.
At a glance
- Severity
- Medium
- Typical repair cost
- 120–500 €
- Workshop time
- 0.5–2 h
- Repair difficulty
- Medium
- DIY possible
- Yes
- Check engine light
- Yes
- Affects emissions test
- Yes
Parts and labour at an independent workshop in Europe. Main dealers charge more; the cause decides the bill, not the code.
Symptoms
- Check engine light on
- Car drives normally
- EVAP readiness monitor not complete
- Technical inspection failure
Common causes
- Failed leak detection pump
- Broken or corroded wiring near the canister, often under the car
- Corroded connector at the pump
- Blown fuse
- Engine computer driver fault (rare)
Can I keep driving with P2400?
Yes, you can keep driving. Have it repaired within one or two weeks, especially before a technical inspection.
What to check first
- Locate the pump near the charcoal canister and inspect the connector for corrosion
- Check the fuse and supply voltage
- Measure pump resistance and wiring continuity to the engine computer
- Replace the pump or repair the wiring
Related codes
- P2418 EVAP system switching valve control circuit/open
- P2459 Diesel particulate filter regeneration frequency (bank 1)
- P2463 Diesel particulate filter restriction, soot accumulation (bank 1)
- P22FB NOx sensor performance, sensing element (bank 1 sensor 1)
- P2293 Fuel pressure regulator 2 (B) performance
- P2291 Injector control pressure too low during cranking
- P261A Coolant pump B control circuit/open
- P2635 Fuel pump A low flow/performance
Data: TORKO fault-code catalogue, built on OBDex (CC0-1.0) and reviewed against workshop practice. Informational only — it does not replace a diagnosis by a mechanic.
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