P0467 — Purge Flow Sensor Circuit Low Input

powertrain (engine/transmission)

Is it safe to drive?

Usually drivable, but repair promptly P0467 is generally an emissions and fuel-management fault rather than an immediate engine-stop condition. Driving is usually possible, but repair it promptly; avoid continued driving if a strong fuel odor, unstable idle, or hesitating engine occurs.

Typical symptoms

The check-engine light or warning lamp illuminates with P0467 stored in the powertrain controller
The EVAP purge flow reading remains near zero while the engine commands purge flow
A slight rough idle, hesitation, or stumble may occur when the purge valve opens
A fuel odor may be present if unburned fuel is released through the EVAP system
Some vehicles show no drivability symptom and reveal P0467 only during an OBD2 scan

Common causes

A failed purge flow sensor with an internally shorted or abnormally low output
A short to ground in the P0467 signal wire caused by damaged insulation or chafing
Corroded, loose, or water-contaminated connector terminals at the purge flow sensor
An incorrect sensor output caused by a defective 5 V reference circuit or poor sensor ground
An incompatible or incorrectly installed purge flow sensor

How to diagnose with an OBD scanner

Capture the P0467 data Connect an OBD2 scanner, ELM327 adapter, or AIScanAuto, then read stored, pending, and freeze-frame data. Note whether commanded EVAP flow rises while the purge flow sensor value stays abnormally low.
Inspect the sensor and connector Locate the purge flow sensor in the EVAP purge line. Disconnect the connector and inspect it for green corrosion, water, bent terminals, or heat damage; also inspect nearby wiring for chafing, pinching, and broken splices.
Test reference, ground, and signal Using the vehicle wiring diagram and a multimeter, verify the sensor supply or 5 V reference, sensor ground, and signal voltage while purge is commanded. A low P0467 signal with proper reference and ground points toward a sensor or signal-circuit fault.
Check for a shorted signal circuit With the sensor disconnected, perform a continuity test from the signal terminal to ground according to the manufacturer procedure. Near-zero continuity indicates a shorted wire; an open or high resistance indicates an interrupted circuit.
Repair and verify Repair the damaged wiring or terminals, or replace the purge flow sensor if it fails the specified electrical test. Clear P0467, command an EVAP purge cycle, and confirm that sensor voltage and flow respond before returning the vehicle.

Approximate repair cost

Independent-shop estimate: $150-$600 for diagnosis and purge-flow-sensor, connector, or wiring repair. These figures are estimates and vary by region, vehicle, and parts availability.

Common questions

Does P0467 mean the EVAP purge hose is blocked?

Not usually. P0467 identifies a low electrical input from the purge flow sensor circuit; a restricted hose more commonly causes an EVAP flow or performance code, although both areas should be inspected.

Can I safely drive with P0467 stored?

P0467 usually does not create an immediate safety hazard, but it can affect fuel metering, emissions, and fuel economy. Repair it promptly and stop driving if fuel odor or severe engine instability appears.

Should the purge flow sensor be replaced first?

Do not replace it solely because P0467 is present. First verify connector condition, reference voltage, ground integrity, signal voltage, and continuity to ground, since wiring faults frequently mimic a failed sensor.

Do I need to replace the EVAP purge valve for P0467?

A purge-valve replacement is not normally indicated by P0467 alone. Confirm that the valve commands correctly and that the sensor produces a changing signal during the commanded purge cycle.

When your check engine light illuminates and a scanner reveals code P0467, the engine control unit has detected a problem within the evaporative emission control system. Specifically, P0467 indicates that the purge flow sensor circuit is reporting an abnormally low voltage input—essentially, the signal is staying near ground when it should be higher. This code falls under the powertrain category, affecting emissions-related components rather than core engine operation.

The evaporative emission system captures fuel vapors from the tank and routes them through a network of hoses, valves, and a charcoal canister. Under certain driving conditions, the powertrain control module opens the purge valve to draw these vapors into the engine for combustion. A dedicated sensor monitors vapor flow through this circuit and reports back to the control unit. When that sensor signal remains too low for an extended period, the module interprets this as a malfunction and stores P0467. The fault typically results from a wiring short, a failed component dragging the circuit down, or a loss of supply voltage to the sensor itself.

The control unit does not set P0467 based on a single anomalous reading. Instead, it requires the fault condition to repeat under specific operating parameters—engine temperature, load, speed, and runtime—before activating the check engine light. This is why capturing freeze frame data alongside the code proves invaluable: that snapshot shows exactly what conditions triggered the fault, allowing you to recreate them during diagnosis.

Symptoms of P0467

In most vehicles, P0467 produces no obvious drivability problems—the car runs and drives normally despite the stored code. However, several indirect symptoms may appear:

Check Engine Light illuminated on the dashboard
Slightly reduced fuel economy due to improper vapor handling
Noticeable fuel odor around the vehicle, most common after refueling
Premature fuel nozzle shutoff during refueling—vapor buildup can trigger the pump's automatic cut-off
No change in engine performance or behavior in most cases

Common Causes of P0467

The root causes range from simple mechanical issues to electrical faults. In order of likelihood:

Wiring short to ground: chafed insulation allows a signal wire to contact metal, pulling voltage low
Missing supply voltage at the purge flow sensor connector
Failed purge flow sensor internally shorting the signal to ground
Cracked, disconnected, or deteriorated EVAP hoses and lines
Saturated or physically damaged charcoal canister
Loose, worn, or improperly sealed fuel cap
Faulty vent valve or leak detection pump within the EVAP system

How to Diagnose P0467

A systematic approach prevents unnecessary part replacements. Follow these steps:

Connect an OBD2 scanner, confirm P0467 is stored, and record all freeze frame data—engine load, rpm, coolant temperature, and vehicle speed at the moment of failure.
Check for additional diagnostic trouble codes; related codes often point toward the actual root cause. Also search manufacturer technical service bulletins for your specific make and model—factory-issued TSBs may document known issues or software updates related to this code.
Perform a thorough visual inspection of the EVAP wiring harness and connectors for damaged insulation, corrosion, bent pins, or loose connections.
Test for supply voltage at the purge flow sensor connector. Then measure resistance from the signal wire to ground—if the reading approaches zero ohms, a short to ground exists in the harness.
Inspect and test the fuel cap first—it is the most frequently encountered culprit. Verify the rubber seal is intact and torque the cap until you hear a click.
Conduct a smoke or nitrogen EVAP leak test to locate small leaks in hoses, the canister, and associated valves.
Clear the code, complete a drive cycle matching the freeze frame conditions, and verify P0467 does not return.

Repair Options for P0467

Address the least expensive possibilities before replacing major components:

Fuel cap replacement: $20–$60
Charcoal canister replacement: $250–$700
Purge valve or vent valve replacement: $120–$350

Total Repair Cost for P0467

Actual repair costs depend entirely on which component is responsible. Typical scenarios at independent repair shops include parts and labor:

Fuel cap only: $20–$60
Purge or vent valve: $120–$350
Charcoal canister: $250–$700

Across all possible repair paths, fixing P0467 typically ranges from $20 to $700. Proper diagnosis before purchasing parts is strongly recommended—the priciest component is rarely the culprit.

Driving Safety with P0467

Severity level: short. This code does not affect engine operation, transmission function, or vehicle safety systems. You can continue driving while arranging repair. However, a persistent fuel vapor odor is a reason to prioritize the fix—fuel vapors are flammable and exposure is undesirable. Schedule the repair at your convenience but do not ignore the smell.