P2407EVAP System Leak Detection Pump Sense Circuit Intermittent/Erratic
- 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
- P2407 reports a pump feedback that jumps around instead of staying steady. On current-measuring DMTL pumps VW's 2014 Golf and Touareg books define it precisely: the pump current fluctuates by more than 1 mA during the reference measurement, or it drops by more than 6 mA for at least 3 s while pumping, checked with the engine off and on. Audi's TSB 2071770 (Q5, Q5 e, Q3, Q7 and others, 2022-23) calls the diagnosis too sensitive and cures it with new ECM software, and VW's 01-23-03 does the same for the 2022 Atlas and Atlas Cross Sport 2.0T before any parts are replaced. Maserati and Jaguar list P2407 too. P2404 is the steady implausibility, P2403 a lost signal. The car runs normally; the warning light is the main effect.
- What you may notice
- Check engine light, sometimes only after the car has been parked
- Code returns irregularly after clearing
- Likely causes
- LikelyOver-sensitive diagnostic calibration, fixed by ECM software update (Audi, VW 2022-23)
- PossibleLoose contact or corrosion at the pump connector
- PossibleWorn pump motor with unstable current draw
- 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: €0 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.