OBDII Code List

P1D8A HONDA - Generator Motor Control Module Gate Line Open

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Generator Motor
  • Generator Motor harness is open or shorted
  • Generator Motor circuit poor electrical connection
  • Faulty Motor Power Inverter (MPI) Module
  • Faulty Motor Control Module (Generator)

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1d8a Honda Description

An open in the gate drive-wire, an OFF failure of the Motor Power Inverter (MPI) Module (generator), an open in the three-phase line, an open in the generator motor power cable, or an open in the generator motor coil causes a deviation from the target torque value of the generator motor. The motor control module (generator) detects these system failures by monitoring each phase current change.

Occurrence of open in the gate drive-wire, the motor power cable line, or the MPI module (generator) OFF failure causes decrease in inflow or outflow of the current of the failed phase (inflow decreases in the event of High side open and outflow decreases in the event of Low side open) causing distortion of the current from the other two phases. As a result, the deviation between the target phase current and actual phase current increases significantly. Malfunction is detected according to deviation of the phase current.

OBDII Code P1d8a Honda - Generator Motor Control Module Gate Line Open -

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