AutoCodes – GMC – P1ABA GMC

P1ABA GMC Code - Starter/Generator Field Coil Current Sensor Circuit High Voltage

Quick Answer

The Starter/Generator Control Module (SGCM) monitors the Motor Generator Unit (MGU) field coil circuit to see if the field coil current is within tolerance. Common causes include Faulty Motor Generator Unit (MGU), Motor Generator Unit (MGU) harness is open or shorted, Motor Generator Unit (MGU) 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
P1ABA GMC indicates Starter/Generator Field Coil Current Sensor Circuit High Voltage.
Common causes
Common causes include Faulty Motor Generator Unit (MGU), Motor Generator Unit (MGU) harness is open or shorted, Motor Generator Unit (MGU) 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 845
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Feb 26, 2020
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Code P1ABA GMC Description

The Starter/Generator Control Module (SGCM) monitors the Motor Generator Unit (MGU) field coil circuit to see if the field coil current is within tolerance.
OBDII Code P1ABA GMC - Starter/Generator Field Coil Current Sensor Circuit High Voltage - AutoCodes.com
P1ABA GMC Code - Starter/Generator Field Coil Current Sensor Circuit High Voltage

What are the Possible Causes of the DTC P1ABA GMC?

  • Faulty Motor Generator Unit (MGU)
  • Motor Generator Unit (MGU) harness is open or shorted
  • Motor Generator Unit (MGU) circuit poor electrical connection

How to Fix the DTC P1ABA GMC?

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 P1ABA GMC 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 P1ABA GMC code?

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Need Help with the 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 P1ABA GMC Code

1. What are the common symptoms of OBDII code P1ABA GMC (Starter/Generator Field Coil Current Sensor Circuit High Voltage)?

- Common symptoms include the illumination of the Check Engine Light, decreased fuel efficiency, and potential issues with the vehicle's starting system.

2. What can cause OBDII code P1ABA GMC to trigger?

- This code can be triggered by a faulty starter/generator field coil current sensor, damaged wiring or connectors in the sensor circuit, or issues with the field coil itself.

3. How serious is OBDII code P1ABA GMC?

- While the severity can vary, it is important to address this code promptly to prevent potential damage to the starter/generator system and ensure proper vehicle operation.

4. Can driving with OBDII code P1ABA GMC cause further damage?

- Continuing to drive with this code may lead to increased strain on the starter/generator components and potential failure of the system, resulting in more significant repair costs.

5. How can I diagnose the cause of OBDII code P1ABA GMC?

- Diagnosis typically involves performing a thorough inspection of the starter/generator system, checking the field coil current sensor and related wiring for issues, and using a scan tool to gather diagnostic information.

6. Is it safe to continue driving with OBDII code P1ABA GMC if the vehicle seems to be operating normally?

- It is not recommended to ignore this code even if the vehicle appears to be running fine, as underlying issues can worsen over time and lead to unexpected breakdowns.

7. What are some repair tips for addressing OBDII code P1ABA GMC?

- Repair tips may include inspecting and repairing damaged wiring or connectors, testing and replacing the field coil current sensor if faulty, and clearing the code to see if it reoccurs.

8. Can I reset OBDII code P1ABA GMC without fixing the underlying issue?

- While you can clear the code using a scan tool, it is crucial to address the root cause to prevent further issues and ensure the proper operation of the starter/generator system.

9. How much does it typically cost to repair OBDII code P1ABA GMC?

- Repair costs can vary depending on the exact cause of the code, but they may include expenses for sensor replacement, wiring repairs, and labor, potentially ranging from a few hundred to over a thousand dollars.

10. Are there any preventive measures to avoid OBDII code P1ABA GMC in the future?

- Regular maintenance checks, including inspecting the starter/generator system components, can help identify potential issues early and prevent the occurrence of this code.

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