OBD Guide
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P06AA

Control Module Internal Temperature B Too High

P06AA is an OBD-II diagnostic trouble code meaning: Control Module Internal Temperature B Too High. Common causes: the ecu is located in the overheating zone (next to the exhaust system, engine), ineffective heat transfer from the ecu (lack of heat-conducting paste, deformation of the housing). Estimated repair cost: $11–556.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$11–556 (est.)

Symptoms

  • Check Engine Light Is On
  • Engine emergency mode with power limitation
  • Unstable operation of the ECU at high ambient temperatures
  • Spontaneous ECU resets
  • Possible engine shutdown in hot weather

Causes

  • The ECU is located in the overheating zone (next to the exhaust system, engine)
  • Ineffective heat transfer from the ECU (lack of heat-conducting paste, deformation of the housing)
  • High ambient temperature combined with prolonged load
  • Malfunction of the engine cooling system (overheating of the engine compartment)
  • Malfunction of internal temperature sensor B in the ECU

How to Fix

  1. Read error codes and real-time data - check the ECU temperature using a scanner
  2. Make sure that the ECU is in the normal location and that there are no additional heat sources nearby
  3. Check the engine cooling system (antifreeze level, thermostat and fan operation)
  4. Inspect the ECU housing for deformation, ensure normal heat transfer
  5. If there is constant overheating, consider installing an additional heat sink
  6. If the cause is a faulty sensor: diagnose and replace the ECU

Related codes

P06ABP06ACP06ADP06AEP0528

Error P06AA by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P06AA code mean?

P06AA is an OBD-II diagnostic trouble code that indicates: Control Module Internal Temperature B Too High

What causes a P06AA error code?

The most common causes of P06AA include: The ECU is located in the overheating zone (next to the exhaust system, engine); Ineffective heat transfer from the ECU (lack of heat-conducting paste, deformation of the housing); High ambient temperature combined with prolonged load; Malfunction of the engine cooling system (overheating of the engine compartment).

How do I fix a P06AA diagnostic trouble code?

To fix P06AA: Read error codes and real-time data - check the ECU temperature using a scanner. Make sure that the ECU is in the normal location and that there are no additional heat sources nearby. Check the engine cooling system (antifreeze level, thermostat and fan operation). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P06AA?

Do not drive — repair immediately

How much does it cost to fix P06AA?

The estimated repair cost for P06AA is $11–556. Actual cost depends on your vehicle, location, and labor rates.

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