OBD Guide
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P05A4

Active Grille Air Shutter A Control Circuit High

P05A4 is an OBD-II diagnostic trouble code meaning: Active Grille Air Shutter A Control Circuit High. Common causes: short circuit of the actuator control wire to power (+12 v), internal short circuit in the motor winding of the blinds actuator. Estimated repair cost: $33–222.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–222 (est.)

Symptoms

  • Check Engine light is on
  • Blinds are not controlled and are locked in a safe position
  • Possible smell of burnt insulation if there is a strong short circuit
  • Decreased fuel efficiency
  • In severe cases, additional electrical errors are possible

Causes

  • Short circuit of the actuator control wire to power (+12 V)
  • Internal short circuit in the motor winding of the blinds actuator
  • Damage to the insulation of control wires with melting
  • Control circuit overload due to mechanical shutter blocking
  • Malfunction of the ECU output stage (rare)

How to Fix

  1. Read error codes and immediately check for signs of overheating or burning wiring
  2. Inspect the control wiring of the blinds actuator for melting or pinching
  3. Measure the voltage in the control circuit with the ignition on - compare with the permissible range
  4. Disconnect the actuator and check the voltage at the connector - if it is high, there is a fault in the wiring or the computer
  5. Measure the resistance of the actuator windings - determine the presence of an internal short circuit
  6. Eliminate short circuit in the wiring or replace the actuator if it is faulty
  7. Reset codes and check the control circuit voltage is normal

Related codes

P05A2P05A3P05A5P05A6P059A

Error P05A4 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P05A4 code mean?

P05A4 is an OBD-II diagnostic trouble code that indicates: Active Grille Air Shutter A Control Circuit High

What causes a P05A4 error code?

The most common causes of P05A4 include: Short circuit of the actuator control wire to power (+12 V); Internal short circuit in the motor winding of the blinds actuator; Damage to the insulation of control wires with melting; Control circuit overload due to mechanical shutter blocking.

How do I fix a P05A4 diagnostic trouble code?

To fix P05A4: Read error codes and immediately check for signs of overheating or burning wiring. Inspect the control wiring of the blinds actuator for melting or pinching. Measure the voltage in the control circuit with the ignition on - compare with the permissible range. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P05A4?

Do not drive — repair immediately

How much does it cost to fix P05A4?

The estimated repair cost for P05A4 is $33–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat