P0467
EVAP Purge Flow Sensor Circuit Low.
- Generic
- Powertrain
- Generic code
- Low severity
How this code is built
- P
- SystemPowertrain
- 0
- Defined bySAE, the same on every car
- 4
- AreaAuxiliary emission controls
- 67
- FaultThe specific fault in that area
What it means
P0467 means the engine control unit has detected a low signal from the evaporative emission (EVAP) purge flow sensor circuit. The voltage it sees is lower than expected, suggesting a short to earth, an open circuit or a faulty sensor. Not every vehicle has a dedicated purge flow sensor, so the layout and sensor location depend on the model and engine.
Symptoms
- Engine warning light on
- Possible failed emissions test
- Rough idle or slight hesitation after refuelling on some models
- Fuel smell around the car in some cases
- Usually no noticeable change in driveability
Possible causes
- Wiring fault in the sensor circuit, such as chafing causing a short to earth or an open circuitlikely
- Corroded, loose or damaged connector at the purge flow sensorlikely
- Faulty purge flow sensorlikely
- Missing or poor sensor supply voltage or earthpossible
- Damaged or blocked EVAP hose or pipe near the sensor affecting its readingpossible
- Fault inside the engine control unitrare
How to diagnose
- Read all stored and pending codes and note the freeze frame data, then check for other EVAP or related codes.
- Visually inspect the purge flow sensor, its wiring and connector for damage, water ingress, corrosion or chafing.
- Check the EVAP hoses and pipes near the sensor for splits, kinks, blockages or disconnections.
- Using the manufacturer's wiring diagram, check the sensor supply, signal and earth with a multimeter.
- Check the sensor signal voltage live data with the engine off and running, and compare it with the specification for that model.
- Test the wiring for continuity and for shorts to earth between the sensor and the control unit.
- Check the sensor itself against the manufacturer's test procedure, as it varies by model.
- Clear the code and road test to confirm the fault does not return.
How to fix
- Repair or replace damaged wiring in the sensor circuit.
- Clean or replace corroded or damaged connector terminals.
- Replace the purge flow sensor if it fails testing.
- Restore the correct supply voltage or earth by repairing the related circuit.
- Replace damaged or blocked EVAP hoses or pipes.
- Check for a software update only if the manufacturer lists an outdated calibration as a known cause for this fault.
Can I keep driving?
Low severity
The car can normally be driven as the fault mainly affects the emissions system. Book it in soon, particularly if a fuel smell is present or an emissions test is due.
Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.