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DTC codes / Volkswagen codes / P1468

P1468 · VolkswagenEVAP Canister Purge Solenoid Valve Short To Ground

P1468 on a Volkswagen means the engine control module has detected a short to ground on the electrical circuit that operates the EVAP canister purge solenoid valve. The computer commands the valve to open and close during its self-test, but the voltage on the control wire stays near zero volts when it should switch between battery voltage and ground. This prevents the purge valve from opening, so fuel vapor stored in the charcoal canister cannot be drawn into the intake for burning.

SystemPowertrain
Code typeVolkswagen specific
SeverityMedium
Fix difficultyIntermediate
AreaAuxiliary emission controls

Symptoms you may notice

  • Illuminated check engine light, often with no other symptoms besides the warning light
  • A faint fuel odor around the engine bay or near the charcoal canister after parking
  • Slightly rough idle or a stumble just after a cold start, because the purge valve may be stuck open or closed
  • Failed emissions inspection due to the check engine light and an incomplete EVAP monitor
  • Occasional hesitation during light acceleration if the valve is stuck partially open and unmetered vapor enters the intake

Common causes, most likely first

  1. Purge solenoid valve internal coil shorted to its metal housing or ground
  2. Chafed or pinched wire in the purge valve harness rubbing against the engine block or intake manifold
  3. Corroded or water-filled connector at the purge solenoid allowing the control wire to short to ground
  4. Faulty engine control module driver circuit for the purge solenoid, though this is rare
  5. Aftermarket alarm or remote start wiring tapped into the purge circuit and shorting to ground
  6. Rodent damage to the purge valve wiring loom, exposing the control wire to the chassis

How to diagnose and fix it

  1. Clear the code and road-test the vehicle to confirm P1468 returns before replacing any parts
  2. Inspect the purge solenoid connector and harness for corrosion, chafing, or rodent damage, repairing wires as needed
  3. Measure resistance across the purge solenoid terminals and compare to the manufacturer specification to rule out a shorted coil
  4. Disconnect the purge solenoid and check for continuity between the control wire and ground with the key off to isolate a harness short
  5. Command the purge solenoid on and off with a scan tool and listen for a click while watching the EVAP pressure sensor response
  6. Replace the purge solenoid valve if the coil is shorted or the valve fails the command test, then clear codes and verify the repair
  7. If the harness and valve test good, check the engine control module driver circuit for a short to ground before condemning the module

Purge valve short circuits that fool technicians

  • A shorted purge solenoid coil often tests fine on a basic resistance check when cold, so perform the test after warming the engine to operating temperature.
  • The purge valve harness on many Volkswagen engines runs close to the oil filter housing, and spilled oil during services can degrade the insulation and cause a short to ground.
  • P1468 can be set intermittently by water intrusion into the connector after engine washing, so dry the connector and retest before replacing the valve.
  • A stuck-open purge valve can cause a lean fuel trim at idle that mimics a vacuum leak, so check fuel trims before assuming the short is the only fault.
  • Some scan tools show P1468 as a pending code after a single failed self-test, so confirm the fault is current with a bidirectional purge test before any repair.

Can I keep driving with P1468?

You can usually drive the vehicle with P1468 set because the purge valve being disabled does not affect engine safety, but avoid long trips until repaired since raw fuel vapor may vent to the atmosphere and the check engine light will prevent an emissions pass. If you smell strong fuel odor or notice rough running, have the vehicle inspected promptly.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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