OBD Guide
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P0656

Fuel Level Output Circuit

P0656 is an OBD-II diagnostic trouble code meaning: Fuel Level Output Circuit. Common causes: ecu output circuit malfunction (fuel level signal), open or short circuit in the wiring between the ecu and the dashboard. Estimated repair cost: $11–111.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$11–111 (est.)

Symptoms

  • Check Engine light comes on
  • Incorrect fuel gauge readings
  • The fuel gauge is frozen in one position
  • The fuel reserve lamp does not light up when the level is low
  • The indicator always shows empty or full tank

Causes

  • ECU output circuit malfunction (fuel level signal)
  • Open or short circuit in the wiring between the ECU and the dashboard
  • Malfunction of the fuel level sensor itself in the tank
  • Malfunction of the fuel level indicator in the dashboard
  • ECU malfunction (rare)

How to Fix

  1. Check the actual fuel level and compare with the readings
  2. Check the signal from the fuel level sensor in the tank on the scanner
  3. Check the ECU output signal on the corresponding pin
  4. Inspect the wiring from the ECU to the dashboard
  5. Check the fuel gauge in the dashboard
  6. If necessary, replace the sensor, repair wiring or dashboard

Related codes

P0460P0461P0462P0463P0464P0650

Error P0656 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0656 code mean?

P0656 is an OBD-II diagnostic trouble code that indicates: Fuel Level Output Circuit

What causes a P0656 error code?

The most common causes of P0656 include: ECU output circuit malfunction (fuel level signal); Open or short circuit in the wiring between the ECU and the dashboard; Malfunction of the fuel level sensor itself in the tank; Malfunction of the fuel level indicator in the dashboard.

How do I fix a P0656 diagnostic trouble code?

To fix P0656: Check the actual fuel level and compare with the readings. Check the signal from the fuel level sensor in the tank on the scanner. Check the ECU output signal on the corresponding pin. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0656?

Yes, but get it checked soon

How much does it cost to fix P0656?

The estimated repair cost for P0656 is $11–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat