Engine-Codes - Generic - P0D66

P0D66 Code - Hybrid/EV Battery Pack Cooling Fan Enable Circuit High Voltage

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|P0D66 code possible causes

  • Faulty Hybrid/EV Battery Pack Cooling Fan
  • Hybrid/EV Battery Pack Cooling Fan harness is open or shorted
  • Hybrid/EV Battery Pack Cooling Fan circuit poor electrical connection
  • Faulty Starter/Generator Control Module

|How is the P0D66 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the cost to diagnose the P0D66 code

Labor: 1.0

The cost to diagnose the P0D66 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are P0D66 code possible symptoms?

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

|What is P0D66 code meaning?

The hybrid/EV battery pack cooling fan draws air through the hybrid/EV battery pack to control the temperature of the hybrid/EV battery pack. To operate, the cooling fan receives an enable signal from the starter/generator control module. The enable control is controlled by a discrete high side driver in the starter/generator control module. When the enable control circuit is high, the fan will be enabled. The fan speed is controlled by a fan control circuit from the starter/generator control module, by changing the duty cycle. The maximum fan speed is 3900 RPM. Hybrid/EV battery pack cooling fan enable circuit open and short to voltage diagnostics run continuously until hybrid/EV battery pack cooling fan is enabled to run while short to ground runs after it is enabled to run. These diagnostics detect and report a failure of the fan to enable circuits.

|Need more information with the P0D66 code?

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|P0D66 code information for specific makes

  • P0D66 BUICK Hybrid/EV Battery Pack Cooling Fan Enable Circuit High Voltage
  • P0D66 CADILLAC Hybrid/EV Battery Pack Cooling Fan Enable Circuit High Voltage
  • P0D66 CHEVROLET Hybrid/EV Battery Pack Cooling Fan Enable Circuit High Voltage
  • P0D66 GMC Hybrid/EV Battery Pack Cooling Fan Enable Circuit High Voltage

|Need help with a P0D66 code?

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