Cause
Faulty purge flow sensor
The sensor confirming vapour actually flowed when the purge valve opened. It usually reports a genuine blockage rather than failing itself — a collapsed hose or a saturated canister — so it belongs at the end of the list rather than the start.
Typically a moderate job.
Codes this can cause (6)
Codes where this is a likely explanation first, rather than merely a possible one.
- P0465 Evaporative Emission Purge Flow Sensor Circuit Likely for this code Low
- P0466 Evaporative Emission Purge Flow Sensor Circuit Range/Performance Likely for this code Low
- P0467 Evaporative Emission Purge Flow Sensor Circuit Low Likely for this code Low
- P0468 Evaporative Emission Purge Flow Sensor Circuit High Likely for this code Low
- P0469 Evaporative Emission Purge Flow Sensor Circuit Intermittent Likely for this code Low
- P0497 Evaporative Emission System Low Purge Flow Low
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