AutoCodes – Saturn – P1AC1 Saturn

P1AC1 Saturn Code - Starter/Generator Control Module Cooling Fan Relay Control Circuit Low Voltage

Quick Answer

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. Common causes include 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. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1AC1 Saturn indicates Starter/Generator Control Module Cooling Fan Relay Control Circuit Low Voltage.
Common causes
Common causes include 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.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 932
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 01, 2020
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Code P1AC1 Saturn 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 P1AC1 Saturn - Starter/Generator Control Module Cooling Fan Relay Control Circuit Low Voltage - AutoCodes.com
P1AC1 Saturn Code - Starter/Generator Control Module Cooling Fan Relay Control Circuit Low Voltage

What are the Possible Causes of the DTC P1AC1 Saturn?

  • 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

How to Fix the DTC P1AC1 Saturn?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1AC1 Saturn code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1AC1 Saturn code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1AC1 Saturn Code

1. What are the common symptoms of OBDII code P1AC1 in a Saturn related to the Starter/Generator Control Module Cooling Fan Relay Control Circuit Low Voltage?

- Common symptoms include vehicle stalling, difficulty starting the engine, poor acceleration, and the illumination of the check engine light.

2. What are the typical causes of OBDII code P1AC1 in a Saturn?

- Causes can include a faulty starter/generator control module cooling fan relay, damaged wiring or connectors in the cooling fan relay circuit, or a weak battery.

3. How can I diagnose OBDII code P1AC1 in my Saturn?

- You can diagnose this code using a diagnostic scanner to read the trouble codes, checking the integrity of the cooling fan relay and related wiring, and testing the battery voltage.

4. What are some repair tips for fixing OBDII code P1AC1 in a Saturn?

- Repair tips may involve replacing the starter/generator control module cooling fan relay, repairing or replacing damaged wiring or connectors, and ensuring the battery is in good condition.

5. Can I drive my Saturn with OBDII code P1AC1?

- It is not recommended to drive your vehicle with this code present, as it can lead to potential issues like stalling or poor performance.

6. How urgent is it to address OBDII code P1AC1 in a Saturn?

- It is important to address this code promptly to prevent further damage to the starter/generator control module and related components.

7. Are there any safety concerns associated with OBDII code P1AC1 in a Saturn?

- Safety concerns may arise due to potential stalling or loss of power while driving, so it is recommended to address this issue as soon as possible.

8. Can a DIY enthusiast repair OBDII code P1AC1 in a Saturn?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address this code by following repair guides or seeking assistance from online forums.

9. How much does it typically cost to repair OBDII code P1AC1 in a Saturn?

- The cost of repair can vary depending on the exact cause of the code, but it may involve replacing the cooling fan relay, repairing wiring, or addressing other related issues.

10. Is it necessary to reset the OBDII code P1AC1 after repairs in a Saturn?

- Yes, it is recommended to reset the trouble codes after completing repairs to see if the issue has been successfully resolved.

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