P04AE

EVAP System Purge Control Valve B Performance Stuck Open

Moderate severity

EVAP System Purge Control Valve B Performance Stuck Open: the component is electrically intact but its response does not match the command.

Common causes

Debris on valve seat prevents full closing
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $130-390
Return spring weakened
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $130-390
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does P04AE mean?

P04AE means "EVAP System Purge Control Valve B Performance Stuck Open". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.

What are the most common causes of P04AE?

debris on valve seat prevents full closing; return spring weakened; carbon or debris buildup preventing free movement — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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