OBD Guide
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B3A03

A/C Refrigerant Distribution Valve Actuator C Control Circuit High

B3A03 is an OBD-II diagnostic trouble code meaning: A/C Refrigerant Distribution Valve Actuator C Control Circuit High. Common causes: short circuit in valve control circuit, refrigerant distribution valve c fault. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Air conditioner doesn't work
  • Reduced cooling efficiency
  • Fault indication on the instrument panel

Causes

  • Short circuit in valve control circuit
  • Refrigerant distribution valve C fault
  • Wiring harness damage
  • Malfunction of the climate control control unit

How to Fix

  1. Check the integrity of the wiring harness and connections
  2. Check resistance of refrigerant distribution valve C
  3. Check control circuit voltage
  4. Replace faulty valve or wiring harness
  5. Reset the error and check the system operation

Related codes

B3A01B3A02B3A04

Error B3A03 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the B3A03 code mean?

B3A03 is an OBD-II diagnostic trouble code that indicates: A/C Refrigerant Distribution Valve Actuator C Control Circuit High

What causes a B3A03 error code?

The most common causes of B3A03 include: Short circuit in valve control circuit; Refrigerant distribution valve C fault; Wiring harness damage; Malfunction of the climate control control unit.

How do I fix a B3A03 diagnostic trouble code?

To fix B3A03: Check the integrity of the wiring harness and connections. Check resistance of refrigerant distribution valve C. Check control circuit voltage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B3A03?

Limited driving only, diagnose soon

How much does it cost to fix B3A03?

The estimated repair cost for B3A03 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat