P2407: EVAP System Leak Detection Pump Sense Circuit Intermittent/Erratic

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.

Symptoms

• Check engine light, sometimes only after the car has been parked
• Code returns irregularly after clearing

Most likely causes

• Over-sensitive diagnostic calibration, fixed by ECM software update (Audi, VW 2022-23)
• Loose contact or corrosion at the pump connector
• Worn pump motor with unstable current draw

What to check, in order

Start with the simplest. You can tick off each step.

1. Start with the fuel cap: tighten it fully and check its seal
2. Gently move the wiring with the engine running and watch whether the reading changes.
3. Inspect the hoses and connections around the tank and the charcoal canister
4. Use the scanner to test the purge and vent solenoid valves
5. Run a smoke test to find small leaks

Good to know

• Repair difficulty: medium
• It affects emissions.

What each character of P2407 means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 4: Emissions
• 07: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2407?

Yes, you can normally keep driving. If there is a strong smell of gasoline, find the leak before continuing and do not smoke nearby.

What causes code P2407?

The most common causes are: over-sensitive diagnostic calibration, fixed by ECM software update (Audi, VW 2022-23); loose contact or corrosion at the pump connector; worn pump motor with unstable current draw.

Related codes

• P2404EVAP System Leak Detection Pump Sense Circuit Range/Performance
• P2403EVAP System Leak Detection Pump Sense Circuit/Open
• P0442EVAP System Leak Detected (small leak)

Sources

• static.nhtsa.gov: MC 10073689 2280
• static.nhtsa.gov: MC 10244469 0001
• static.nhtsa.gov: MC 10232746 0001
• static.nhtsa.gov: MC 10176340 9999

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.