OBD Guide
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B3A26

Active Aerodynamic Feature Control Module A Power Mode Circuit/Open

B3A26 is an OBD-II diagnostic trouble code meaning: Active Aerodynamic Feature Control Module A Power Mode Circuit/Open. Common causes: broken wire in the module power harness, oxidation or damage to contacts in connectors. Estimated repair cost: $56–278.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Inoperative active aerodynamics elements
  • Error message on the dashboard
  • Reduced aerodynamic efficiency at high speeds
  • False alarms of other systems are possible

Causes

  • Broken wire in the module power harness
  • Oxidation or damage to contacts in connectors
  • Blown power fuse
  • Power relay fault
  • Failure of the active aerodynamics module itself

How to Fix

  1. Check the condition of the module circuit fuses (according to the electrical diagram)
  2. Inspect the wiring harness for damage (especially in bend areas)
  3. Check the contacts in the connectors of the module and control unit
  4. Test the power supply to the module contacts when the ignition is turned on
  5. If necessary, replace the active aerodynamics module

Related codes

B3A25B3A27U0121U0140

Error B3A26 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the B3A26 code mean?

B3A26 is an OBD-II diagnostic trouble code that indicates: Active Aerodynamic Feature Control Module A Power Mode Circuit/Open

What causes a B3A26 error code?

The most common causes of B3A26 include: Broken wire in the module power harness; Oxidation or damage to contacts in connectors; Blown power fuse; Power relay fault.

How do I fix a B3A26 diagnostic trouble code?

To fix B3A26: Check the condition of the module circuit fuses (according to the electrical diagram). Inspect the wiring harness for damage (especially in bend areas). Check the contacts in the connectors of the module and control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B3A26?

Limited driving only, diagnose soon

How much does it cost to fix B3A26?

The estimated repair cost for B3A26 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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