Code result
P04F1
EVAP System Purge Line Performance
Moderate severity
What it means
A general performance fault on the EVAP purge line - flow does not match the requested rate, without specifying which segment. Usually a partially blocked line, a stuck purge valve, or a leak that decouples flow from valve commands.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Purge line partially blocked
highOne of the most commonly reported causes for this code — check this first.
Purge valve responds slowly
mediumA plausible cause — test and verify before replacing parts.
Related help
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