A high side driver within the ECM allows the ECM to turn the generator ON and OFF. P065B Meaning The Engine Control Module (ECM) uses the generator turn ON signal circuit to control the generator. If the engine control module (PCM) detects an incorrect signal from the High Voltage Control Module, the PCM will set code P065B. OBD II P065B OBD-II Code Engine may not start is defined as a Generator Control Circuit Range/Performance The Generator is part of the Hybrid Inverter/Converter Assembly and is replaced as a unit. That may include but is not limited to vehicles from Ford, Land Rover, Chevrolet, Dodge, GMC, Ram, etc. What does that mean? This is a generic diagnostic trouble code (DTC) and applies to many OBD-II vehicles (1996-newer). Generator Control Circuit Range/Performance. ![]() ![]() When Generator operation is desired, the ECM sends a 5 volt signal to the voltage regulator via the generator turn on signal circuit. ![]() P065b Ford Description The Engine Control Module (ECM) uses the generator turn ON signal circuit to control the generator.
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