OBD Guide
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P0466

EVAP Purge Flow Sensor Circuit Range/Performance

P0466 is an OBD-II diagnostic trouble code meaning: EVAP Purge Flow Sensor Circuit Range/Performance. Common causes: faulty evap purge flow sensor, clogged or damaged purge valve. Estimated repair cost: $17–89.

Severity
✅ Low
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$17–89 (est.)

Symptoms

  • Check Engine Light Is On
  • Faint smell of fuel from the engine compartment
  • Possible slight deterioration in fuel economy
  • Unstable engine operation at idle
  • Difficulty starting after a long stay

Causes

  • Faulty EVAP purge flow sensor
  • Clogged or damaged purge valve
  • Cracks or breaks in EVAP hoses
  • Sensor contamination with fuel vapor or oil
  • Electrical connection failure in the sensor circuit
  • ECU malfunction (rare)

How to Fix

  1. Read and write down all error codes; check for related EVAP codes
  2. Visually inspect EVAP system hoses for cracks, kinks, and disconnections.
  3. Check the electrical connector of the purge flow sensor: oxidation, damaged contacts
  4. Measure the supply voltage and signal wire of the sensor with a multimeter
  5. Replace the purge flow sensor if the readings deviate
  6. Check the purge valve: apply voltage directly, make sure it opens/closes
  7. Check the EVAP system for leaks using a smoke machine
  8. Reset codes and test drive to confirm troubleshooting

Related codes

P0440P0441P0442P0446P0455P0456P0467P0468

Error P0466 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0466 code mean?

P0466 is an OBD-II diagnostic trouble code that indicates: EVAP Purge Flow Sensor Circuit Range/Performance

What causes a P0466 error code?

The most common causes of P0466 include: Faulty EVAP purge flow sensor; Clogged or damaged purge valve; Cracks or breaks in EVAP hoses; Sensor contamination with fuel vapor or oil.

How do I fix a P0466 diagnostic trouble code?

To fix P0466: Read and write down all error codes; check for related EVAP codes. Visually inspect EVAP system hoses for cracks, kinks, and disconnections.. Check the electrical connector of the purge flow sensor: oxidation, damaged contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0466?

Do not drive — repair immediately

How much does it cost to fix P0466?

The estimated repair cost for P0466 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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