OBD Guide
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P06AC

Control Module Internal Temperature Sensor B Range/Performance

P06AC is an OBD-II diagnostic trouble code meaning: Control Module Internal Temperature Sensor B Range/Performance. Common causes: degradation of internal temperature sensor b on the ecu board, exposure to moisture that changes sensor performance. Estimated repair cost: $56–667.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–667 (est.)

Symptoms

  • Check Engine Light Is On
  • Unreliable ECU temperature readings according to scanner data
  • Possible emergency mode due to incorrect thermal information
  • Unstable performance at temperature extremes
  • Random engine control errors

Causes

  • Degradation of internal temperature sensor B on the ECU board
  • Exposure to moisture that changes sensor performance
  • Previous overheating that damaged the sensor
  • Deviation of sensor characteristics due to aging
  • Soldering defect or microcrack in the sensor circuit

How to Fix

  1. Read error codes and analyze ECU temperature readings on a scanner
  2. Compare sensor B readings with actual operating conditions
  3. Check code history for P06AA (overheating) as the root cause
  4. Inspect the ECU for traces of moisture and corrosion on the connectors
  5. Send the ECU for diagnostics to a specialized workshop
  6. If repair is impossible, replace the ECU

Related codes

P06AAP06ABP06ADP06AE

Error P06AC by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P06AC code mean?

P06AC is an OBD-II diagnostic trouble code that indicates: Control Module Internal Temperature Sensor B Range/Performance

What causes a P06AC error code?

The most common causes of P06AC include: Degradation of internal temperature sensor B on the ECU board; Exposure to moisture that changes sensor performance; Previous overheating that damaged the sensor; Deviation of sensor characteristics due to aging.

How do I fix a P06AC diagnostic trouble code?

To fix P06AC: Read error codes and analyze ECU temperature readings on a scanner. Compare sensor B readings with actual operating conditions. Check code history for P06AA (overheating) as the root cause. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P06AC?

Limited driving only, diagnose soon

How much does it cost to fix P06AC?

The estimated repair cost for P06AC is $56–667. Actual cost depends on your vehicle, location, and labor rates.

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