What it means
EVAP purge flow sensor below lower plausibility — short to ground. The evaporative system captures fuel vapor from the tank and purges it into intake; leaks or stuck purge valves leak hydrocarbons and cause emissions failures.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The EVAP purge flow sensor measures vapor flow from the charcoal canister toward the engine during purge. P0467 sets when the control module sees the sensor A circuit signal below its expected range, commonly because the signal is shorted to ground or the connection has excessive resistance.
Common causes
Most likely first.
- Short to ground
- Connector pins corroded - high contact resistance
- Harness chafing through insulation
Symptoms
- Check engine light on
How to diagnose it
- Check freeze-frame and live sensor data to confirm the purge flow signal was low when P0467 set and note whether purge was commanded.
- Inspect the purge flow sensor connector for corrosion, moisture, loose pins, or terminals that may be pulling the signal down.
- Trace the signal wire for chafing through its insulation or contact with ground, particularly near the EVAP components.
- Use the wiring diagram to check the signal circuit for a short to ground and verify sensor supply and ground as applicable.
- If the circuit checks out, test the purge flow sensor against the manufacturer's specification.
Common fixes
- Clean and secure corroded purge flow sensor terminals.
- Repair a signal wire shorted to ground or chafed against another component.
- Repair damaged connector terminals that create poor contact.
- Replace the purge flow sensor if it produces a low signal with a verified, intact circuit.
Can I keep driving?
Driving is usually possible if the engine runs normally, but the EVAP system may not purge correctly and emissions performance can suffer. Address it soon and stop to investigate if fuel vapor odor becomes strong.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.