OBD Guide
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U356B

Anode Drain Valve

U356B is an OBD-II diagnostic trouble code meaning: Anode Drain Valve. Common causes: anode drain valve malfunction, open or short circuit in the circuit. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Check Engine light comes on
  • Increased fuel consumption
  • Smell of gasoline in the cabin
  • Problems starting the engine

Causes

  • Anode drain valve malfunction
  • Open or short circuit in the circuit
  • Wiring harness damage
  • Control unit malfunction

How to Fix

  1. Check valve circuit integrity
  2. Check valve resistance
  3. Replace faulty valve
  4. Check the operation of the EVAP system
  5. Reset the error and take a test drive

Related codes

U356AU356CU356D

Error U356B by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U356B code mean?

U356B is an OBD-II diagnostic trouble code that indicates: Anode Drain Valve

What causes a U356B error code?

The most common causes of U356B include: Anode drain valve malfunction; Open or short circuit in the circuit; Wiring harness damage; Control unit malfunction.

How do I fix a U356B diagnostic trouble code?

To fix U356B: Check valve circuit integrity. Check valve resistance. Replace faulty valve. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U356B?

Yes, but get it checked soon

How much does it cost to fix U356B?

The estimated repair cost for U356B is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat