OBD Guide
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U02AC

Lost Communication With Turbocharger/Supercharger Boost Control A

U02AC is an OBD-II diagnostic trouble code meaning: Lost Communication With Turbocharger/Supercharger Boost Control A. Common causes: broken or damaged wires in the control circuit, turbocharger control module malfunction. Estimated repair cost: $17–89.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Reduced engine power
  • Check Engine Light Illuminates
  • Engine transition to emergency mode
  • Unstable turbine operation
  • Dips during acceleration

Causes

  • Broken or damaged wires in the control circuit
  • Turbocharger control module malfunction
  • Control module power problems
  • Short circuit in the circuit
  • Engine ECU malfunction

How to Fix

  1. Check the integrity of the wiring harness to the control module
  2. Check fuses and relays associated with the system
  3. Diagnose the turbocharger control module
  4. Check connections and connectors for oxidation
  5. Scan the system for other errors

Related codes

U02ABU02ADU02AE

Error U02AC by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U02AC code mean?

U02AC is an OBD-II diagnostic trouble code that indicates: Lost Communication With Turbocharger/Supercharger Boost Control A

What causes a U02AC error code?

The most common causes of U02AC include: Broken or damaged wires in the control circuit; Turbocharger control module malfunction; Control module power problems; Short circuit in the circuit.

How do I fix a U02AC diagnostic trouble code?

To fix U02AC: Check the integrity of the wiring harness to the control module. Check fuses and relays associated with the system. Diagnose the turbocharger control module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U02AC?

Limited driving only, diagnose soon

How much does it cost to fix U02AC?

The estimated repair cost for U02AC is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat