P0467
Purge Flow Sensor Circuit Low InputP0467 is a generic OBD-II powertrain diagnostic trouble code: Purge Flow Sensor Circuit Low Input. It is logged by the engine control unit when the powertrain monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.
What P0467 means
P0467 — Purge Flow Sensor Circuit Low Input — is a hard electrical fault: the PCM has measured a voltage or frequency signal from the purge flow sensor that is at or below the minimum valid threshold. Unlike the rationality-based P0466, P0467 is a clear electrical low that the module cannot rationalise as any valid flow condition.
On voltage-output PFS types, a low signal typically means the signal wire is shorted to ground, the sensor's internal supply is lost, or the sensor element itself has failed short. On frequency-output types (used on some Honda applications), an abnormally low or absent pulse frequency is detected. In either case the PCM cannot derive a valid flow reading and flags the circuit as failed-low.
The practical effect is identical to P0465: closed-loop EVAP purge management is degraded or disabled, the MIL illuminates, and the vehicle will fail an emissions inspection if the code is active. There is no limp mode association. Because P0467 indicates a hard electrical fault rather than a performance issue, the diagnostic path prioritises wiring inspection and sensor voltage checks ahead of smoke testing or solenoid evaluation.
Common causes
Most-frequently reported root causes when P0467 is logged.
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1
Signal wire shorted to chassis ground between the PFS connector and the PCM.
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2
Internal short within the purge flow sensor pulling the signal line low.
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3
Loss of reference voltage supply to the sensor — if the supply wire is open, the signal rail is pulled low by internal sensor circuitry.
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4
Corroded or water-contaminated sensor connector creating a low-resistance path to ground.
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5
Chafed wiring harness where the signal conductor contacts the body or chassis.
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6
Failed PCM input circuit holding the signal line low (rare; only after all external causes are excluded).
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7
Blockage in the EVAP purge line causing no vapour flow, which on some sensor designs produces a below-threshold output (borderline with P0466 depending on threshold calibration).
Symptoms drivers notice
How to diagnose P0467
A typical diagnostic flow when this code is present.
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1
Connect a scan tool and record all DTCs; note any companion EVAP or purge solenoid codes.
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2
With KOEO, measure reference voltage at the PFS connector — verify the correct supply voltage is present (typically 5 V or 12 V depending on sensor type).
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3
With the sensor connected and KOEO, measure the signal wire voltage; a reading at or near 0 V (or absent frequency) confirms the fault is active.
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4
Disconnect the sensor and re-measure the signal wire voltage — if it rises to reference level, the sensor is pulling the line low (internal short); if it remains at 0 V, the fault is in the wiring.
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5
Inspect the harness from the sensor connector to the PCM for chafing, moisture ingress, or contact with grounded body panels.
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6
Measure ground continuity from the sensor ground pin to chassis; verify there is no unintended additional ground path on the signal wire.
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7
Replace the purge flow sensor if internal short is confirmed and harness checks pass.
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8
After repair, command purge solenoid open via scan tool and verify PFS PID rises to a plausible flow value.
Related powertrain codes
- P0400 — Exhaust Gas Recirculation Flow Malfunction
- P0401 — Exhaust Gas Recirculation Flow Insufficient Detected
- P0402 — Exhaust Gas Recirculation Flow Excessive Detected
- P0403 — Exhaust Gas Recirculation Circuit Malfunction
- P0404 — Exhaust Gas Recirculation Circuit Range/Performance
- P0405 — Exhaust Gas Recirculation Sensor A Circuit Low
Frequently asked questions
How is P0467 different from P0466?
P0466 is a rationality fault — the sensor reads an electrically valid signal that does not match the PCM's flow model. P0467 is a hard electrical low — the signal is below the minimum threshold and cannot represent any valid flow value. P0467 diagnosis focuses on wiring shorts and sensor supply voltage; P0466 diagnosis focuses on actual EVAP system behaviour.
Can a completely blocked purge line cause P0467?
Possibly, depending on the sensor design. Some flow sensors output a minimum voltage or zero frequency when flow is absent, which can fall below the PCM's valid range threshold. However, a blockage more commonly sets P0466 (flow present but too low against the commanded amount) rather than P0467. If the code sets immediately at key-on before any purge command is issued, the cause is electrical rather than mechanical.
Disabling P0467 in software
RaceTune can permanently disable P0467 — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.
Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.
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