P240000 on Volkswagen: Evaporative Emission System Leak Detection Pump Control Circuit/Open
Diagnostic trouble code P240000 on Volkswagen vehicles — what it means, the common
causes, and how to confirm the real fault before replacing parts.
What does P240000 mean?
P240000 indicates: Evaporative Emission System Leak Detection Pump Control Circuit/Open.
This relates to the Powertrain system.
Common causes of P240000
pressure remaining in the EVAP system preventing LDP diaphragm from seating
LDP diaphragm not seated resulting in reed switch not closing
specific electrical failure in the EVAP system circuit
What to check (live data)
Display Group 071, Display Zone 1 (should read 'closed' when diaphragm is seated; reads 'open' when pressure prevents diaphragm from seating)
Parts often involved in P240000
Leak Detection Pump (LDP)
LDP diaphragm
LDP reed switch
LDP vacuum switch
LDP inlet valve
LDP outlet valve
EVAP shut-off valve
fuel cap
Don't replace parts until the root cause is confirmed — many of these codes are caused by wiring, a connector or an upstream fault, not the part itself.
Get the confirmed root cause for P240000 — on YOUR vehicle
A code is a symptom, not a diagnosis. AutoDX Pro cross-checks several
independent assessments, pinpoints the actual root cause, gives you the
exact tests to confirm it, and shows the parts — only after the cause is
confirmed. Reads your scan-tool photo and decodes your VIN with open
recalls.
P240000 is a diagnostic trouble code: Evaporative Emission System Leak Detection Pump Control Circuit/Open.
What are the common causes of P240000 on a Volkswagen?
Common causes include: pressure remaining in the EVAP system preventing LDP diaphragm from seating, LDP diaphragm not seated resulting in reed switch not closing, specific electrical failure in the EVAP system circuit. The exact cause depends on the vehicle — confirm it before replacing parts.
Can I keep driving a Volkswagen with P240000?
It depends on the fault and your symptoms. Some causes are minor, others can damage components or affect safety. Get the root cause confirmed before deciding.
How do I fix P240000 on a Volkswagen?
Confirm the actual root cause with targeted tests first, then replace only the part that's at fault. AutoDX Pro gives you the root cause, the exact tests, and the parts for P240000 on your specific Volkswagen.