P1AA8 – Starter/Generator Field Control Performance

P1AA8 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1AA8 Possible Causes

Faulty Motor Generator Unit (MGU),Motor Generator Unit (MGU) harness is open or shorted,Motor Generator Unit (MGU) circuit poor electrical connection

P1AA8 Description

The Starter/Generator Control Module (SGCM) monitors the Motor Generator Unit (MGU) field coil circuit to see if the field coil current is within tolerance.