OBDII Code List

P1D81 HONDA - Voltage Control Unit Malfunction Signal Line Low

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

  • Faulty Voltage Control Unit (VCU)
  • Voltage Control Unit (VCU) harness is open or shorted
  • Voltage Control Unit (VCU) circuit poor electrical connection

Possible symptoms

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

P1d81 Honda Description

The motor control module receives the abnormality inside the Motor Power Inverter (MPI) module detected by MPI module as an abnormality signal. If abnormality information continues for a set time, the motor control module detects a malfunction and stores a DTC.
OBDII Code P1d81 Honda - Voltage Control Unit Malfunction Signal Line Low -

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