Powertrain, generic · Hybrid propulsion

P0D32 DC/DC Converter A Over Temperature

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0D32 means DC/DC converter A, which supplies the 12 V network from the high-voltage battery, has become too hot. Unlike the sensor codes P0C38-P0C3C, the reading itself is trusted; the temperature is the problem. Honda names P0D32 in bulletin 26-025 for 2023-2025 Accord Hybrid models alongside other power control unit overheating codes such as P0A3C and P0A3E: road debris can get past a weak guard and damage the PCU radiator, coolant escapes, and several warning lights appear with reduced hybrid performance. The remedy is a new guard and, if the radiator leaks, a new radiator. Low coolant, a weak electronics coolant pump, a clogged radiator or trapped air are the usual causes. The converter cuts or stops its output, so the 12 V battery can run flat.

Likely causes

Coolant loss in the power electronics circuit, e.g. damaged PCU radiator (Honda)
Weak electronics coolant pump or air in the cooling circuit
Radiator clogged or airflow restricted
Internal converter fault with excess heat

Symptoms

  • Several warning lights including MIL
  • Reduced hybrid system performance
  • 12 V battery discharges, charging warning

Repair estimate

DifficultyHardWorkshop job
Parts and labour€50–2,500
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

dcdc converter a

Related codes

P0C38P0C39P0A94P0A3CP0A3E

References: static.nhtsa.gov, law.cornell.edu.