Engine-Codes - Gmc - P0C32 GMC

P0C32 GMC - Hybrid/EV Battery Pack Cooling System Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0C32 GMC 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 do I fix code P0C32 GMC?

Check 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.

Cost of diagnosing the P0C32 GMC code

Labor: 1.0

The cost of diagnosing the P0C32 GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

P0C32 GMC 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 in the Starter/Generator Control Module, by changing the duty cycle. Maximum fan speed is 3900 RPM.
The Hybrid/EV Battery Pack cooling system consists of the Hybrid/EV Battery Pack Cooling Fan pulling air through a set of porous ducts within the Hybrid/EV Battery Pack. These ducts direct air through the Hybrid/EV Battery Sections and under the Starter/Generator Control Module, where the air passes by various heat sinks and cavities to cool the internal electronic components. The performance diagnostic for the hybrid battery pack cooling fan is a functional check for the fan. The fan control feature uses the outcome of this diagnostic to take emissions related remedial actions. The Hybrid/EV Battery Pack cooling system performance diagnostic determines if the cooling system is providing the expected amount of conditioning. The Hybrid/EV Battery Pack Cooling Fan not spinning at the commanded speed or a blocked duct are examples of conditions of reduced performance.
The Starter/Generator Control Module uses a temperature model to predict the temperature of the 14 volt power module, an internal electronic component of the Starter/Generator Control Module. The Starter/Generator Control Module compares this predicted temperature to the 14 volt power module temperature sensor 1. With the Hybrid/EV Battery Pack Cooling Fan operating, the predicted 14 volt power module temperature and the 14 volt power module temperature sensor 1 should be nearly the same.

P0C32 GMC More Information

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