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P1AC2 Code - Starter/Generator Control Module Cooling Fan Relay Control Circuit High Voltage

- Code Popularity: 1,094 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1AC2?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Starter/Generator Control Module Cooling Fan Relay
  • Starter/Generator Control Module Cooling Fan Relay harness is open or shorted
  • Starter/Generator Control Module Cooling Fan Relay circuit poor electrical connection
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How to Fix the DTC P1AC2?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1AC2 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P1AC2 Description

The Starter/Generator Control Module (SGCM) controls the coolant fan operation by applying voltage to the coolant fan relay control circuit with an internal solid state device called a driver. When the SGCM is commanding the relay ON, the voltage of the control circuit should be low, near 0 volts. When the SGCM is commanding the relay OFF, the voltage potential of the control circuit should be high, near 12 volts.
The SGCM monitors the relay control circuits for the following conditions:
- Short to ground
- Short to voltage
An open circuit
If the SGCM detects an improper voltage level on the coolant fan relay control circuit, then DTC P1AC1 or P1AC2 will set and the driver will be disabled.

OBDII Code P1AC2 - Starter/Generator Control Module Cooling Fan Relay Control Circuit High Voltage - AutoCodes.com
P1AC2 Code - Starter/Generator Control Module Cooling Fan Relay Control Circuit High Voltage

Need More Information on the Code?

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Information for Specific Makes

  • P1AC2 Buick Starter/Generator Control Module Cooling Fan Relay Control Circuit High Voltage
  • P1AC2 Cadillac Starter/Generator Control Module Cooling Fan Relay Control Circuit High Voltage
  • P1AC2 Chevrolet Starter/Generator Control Module Cooling Fan Relay Control Circuit High Voltage
  • P1AC2 GMC Starter/Generator Control Module Cooling Fan Relay Control Circuit High Voltage
  • P1AC2 Saturn Starter/Generator Control Module Cooling Fan Relay Control Circuit High Voltage

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Code P1AC2 comments

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