P1A6B GMC Code - Starter/Generator Control Module 5 Volt Reference Circuit
Quick Answer
The purpose of the Accessory Power Module (APM), integral to the Starter/Generator Control Module (SGCM), is to control the amount and direction of energy flowing between the 42 V DC and 14 V DC buses via the APM, bi-directional 42 V DC to 14 V DC converter. Common causes include Faulty Starter/Generator Control Module (SGCM), Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module 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
- P1A6B GMC indicates Starter/Generator Control Module 5 Volt Reference Circuit.
- Common causes
- Common causes include Faulty Starter/Generator Control Module (SGCM), Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module 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.
Code P1A6B GMC Description
When the APM Power Conversion direction is set to a value of 42 V to 14 V, the energy will flow from the 42 V DC Bus to the 14 V DC Bus via the APM. When the Service Charge or jump starting is requested, the energy will flow from the 14 V DC Bus to the 42 V DC Bus via the APM. When the APM Power Conversion direction is set to a value of Off, the APM will be turned off, and not consume or transfer any power. When the APM Power Conversion direction is set to a value of Invalid, the energy will flow from the 42 V DC Bus to the 14 V DC Bus via the APM.
What are the Possible Causes of the DTC P1A6B GMC?
- Faulty Starter/Generator Control Module (SGCM)
- Starter/Generator Control Module harness is open or shorted
- Starter/Generator Control Module circuit poor electrical connection
How to Fix the DTC P1A6B 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 P1A6B 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.
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Frequently Asked Questions about P1A6B GMC Code
1. What are common symptoms of OBDII code P1A6B GMC related to the Starter/Generator Control Module 5 Volt Reference Circuit?
- Common symptoms include engine stalling, rough idling, poor acceleration, and issues with starting the vehicle.
2. What are possible causes of OBDII code P1A6B GMC indicating a problem with the Starter/Generator Control Module 5 Volt Reference Circuit?
- Possible causes include a faulty starter/generator control module, damaged wiring or connectors, low battery voltage, or a software issue.
3. How can I diagnose the issue causing OBDII code P1A6B GMC to appear for the Starter/Generator Control Module 5 Volt Reference Circuit?
- Diagnose the issue by checking the wiring and connectors for damage, testing the battery voltage, inspecting the control module, and using a diagnostic scanner to read the code.
4. Can a DIY enthusiast repair OBDII code P1A6B GMC related to the Starter/Generator Control Module 5 Volt Reference Circuit?
- While some basic troubleshooting steps can be performed by a DIY enthusiast, repairing this code may require specialized tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.
5. Are there any quick tips for fixing OBDII code P1A6B GMC associated with the Starter/Generator Control Module 5 Volt Reference Circuit?
- Quick tips include checking and tightening all wiring connections, ensuring the battery is fully charged, and resetting the vehicle's computer by disconnecting the battery for a few minutes.
6. What are the potential risks of ignoring OBDII code P1A6B GMC regarding the Starter/Generator Control Module 5 Volt Reference Circuit?
- Ignoring this code can lead to further damage to the starter/generator control module, decreased fuel efficiency, and ultimately, vehicle breakdown.
7. Is it safe to continue driving with OBDII code P1A6B GMC triggered by issues with the Starter/Generator Control Module 5 Volt Reference Circuit?
- It is not recommended to continue driving with this code present, as it can affect the vehicle's performance and reliability. It is best to address the issue promptly to prevent further damage.
8. How much does it typically cost to repair OBDII code P1A6B GMC related to the Starter/Generator Control Module 5 Volt Reference Circuit?
- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500, including parts and labor.
9. Can extreme weather conditions impact the occurrence of OBDII code P1A6B GMC for the Starter/Generator Control Module 5 Volt Reference Circuit?
- Yes, extreme weather conditions such as extreme cold or heat can sometimes exacerbate electrical issues that trigger this code. It's important to keep the vehicle properly maintained in all weather conditions.
10. How long does it typically take to fix OBDII code P1A6B GMC associated with the Starter/Generator Control Module 5 Volt Reference Circuit?
- The repair time can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the problem.
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