P06AA

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

Error P06AA by Vehicle Brand