P0467 signals that the evaporative emission system's purge flow sensor is detecting a lower flow rate than the PCM expects, often due to a sensor fault or restriction in the purge circuit.
The sensor itself can fail internally, providing a low‑flow signal even when the purge system is operating correctly.
Corroded, loose, or broken wires/connector pins can interrupt the sensor signal, causing a low‑flow reading.
A restriction in the purge line limits vapor flow, resulting in a low‑flow indication from the sensor.
If the purge valve does not open fully or leaks, the actual flow is reduced, triggering the low‑flow code.
A rare malfunction of the PCM's input circuit can misinterpret sensor data, but this is usually only after other components have been verified.
No. The code most often stems from a faulty purge flow sensor, wiring issue, or a restriction in the purge system; PCM replacement is rarely required unless the input circuit is proven defective.
Yes. A leak in the purge line or a cracked hose can reduce the measured flow, leading the PCM to set P0467.
The vehicle may still run, but you could experience rough idle, reduced fuel efficiency, or a persistent Check Engine Light; it is advisable to diagnose and repair the issue promptly.
Cleaning may help if the sensor is contaminated, but if the sensor is internally faulty, replacement is necessary rather than cleaning alone.