OBD Guide
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B396C

Liftgate Mode Switch Circuit Performance Signal Invalid

B396C is an OBD-II diagnostic trouble code meaning: Liftgate Mode Switch Circuit Performance Signal Invalid. Common causes: rear door mode switch malfunction, short circuit or open circuit in the switch circuit. Estimated repair cost: $22–111.

Severity
✅ Low
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–111 (est.)

Symptoms

  • The rear door does not respond to mode changes
  • The door does not open all the way or is too high
  • Rear door fault light is on
  • The mode switch does not change the behavior of the door
  • Error code persists after reset

Causes

  • Rear door mode switch malfunction
  • Short circuit or open circuit in the switch circuit
  • Moisture getting into the switch
  • Switch connector oxidation
  • Rear door control module software failure

How to Fix

  1. Read error codes and check data in real time when switching modes
  2. Inspect the switch for physical damage
  3. Measure switch signals in each position
  4. Clean or replace the mode switch
  5. Check rear door module software update
  6. Reset codes and check operation

Related codes

B396BB396DB3960

Error B396C by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the B396C code mean?

B396C is an OBD-II diagnostic trouble code that indicates: Liftgate Mode Switch Circuit Performance Signal Invalid

What causes a B396C error code?

The most common causes of B396C include: Rear door mode switch malfunction; Short circuit or open circuit in the switch circuit; Moisture getting into the switch; Switch connector oxidation.

How do I fix a B396C diagnostic trouble code?

To fix B396C: Read error codes and check data in real time when switching modes. Inspect the switch for physical damage. Measure switch signals in each position. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B396C?

Do not drive — repair immediately

How much does it cost to fix B396C?

The estimated repair cost for B396C is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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