P1A6B 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 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 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?
- 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?
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 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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Information for Specific Makes
- P1A6B Buick — Starter/Generator Control Module 5 Volt Reference Circuit
- P1A6B Cadillac — Starter/Generator Control Module 5 Volt Reference Circuit
- P1A6B Chevrolet — Starter/Generator Control Module 5 Volt Reference Circuit
- P1A6B GMC — Starter/Generator Control Module 5 Volt Reference Circuit
- P1A6B Saturn — Starter/Generator Control Module 5 Volt Reference Circuit
Frequently Asked Questions about P1A6B Code
1. What are the common symptoms of OBDII code P1A6B related to the Starter/Generator Control Module 5 Volt Reference Circuit?
- Common symptoms include starting issues, charging system malfunctions, and dashboard warning lights related to the hybrid system.
2. What are the potential causes of OBDII code P1A6B indicating a problem with the Starter/Generator Control Module 5 Volt Reference Circuit?
- Causes can include a faulty starter/generator control module, damaged wiring or connectors, or issues with the power supply to the module.
3. How can I diagnose the OBDII code P1A6B in relation to the Starter/Generator Control Module 5 Volt Reference Circuit?
- Diagnosing the code involves using a scan tool to retrieve the specific error code, inspecting the wiring and connectors for damage, and testing the voltage supply to the control module.
4. Can I continue driving my vehicle with OBDII code P1A6B related to the Starter/Generator Control Module 5 Volt Reference Circuit?
- It is not recommended to continue driving the vehicle with this code present, as it can lead to further electrical system issues and potential breakdowns.
5. How can I repair OBDII code P1A6B associated with the Starter/Generator Control Module 5 Volt Reference Circuit?
- Repairing the issue may involve replacing the faulty starter/generator control module, repairing damaged wiring or connectors, or addressing any power supply issues.
6. Are there any DIY tips for addressing OBDII code P1A6B related to the Starter/Generator Control Module 5 Volt Reference Circuit?
- While some basic inspections can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for a proper diagnosis and repair of this code.
7. What is the role of the Starter/Generator Control Module in the vehicle's electrical system?
- The Starter/Generator Control Module manages the operation of the vehicle's starter and generator, ensuring proper functionality and power distribution.
8. How important is it to address OBDII code P1A6B concerning the Starter/Generator Control Module 5 Volt Reference Circuit promptly?
- It is crucial to address this code promptly to prevent potential damage to the vehicle's electrical system and ensure safe and reliable operation of the vehicle.
9. Can a faulty battery be a potential cause of OBDII code P1A6B related to the Starter/Generator Control Module 5 Volt Reference Circuit?
- While a faulty battery can sometimes cause electrical issues, OBDII code P1A6B is more commonly associated with problems specific to the starter/generator control module and its circuitry.
10. Is it necessary to reset the OBDII system after repairing OBDII code P1A6B related to the Starter/Generator Control Module 5 Volt Reference Circuit?
- Yes, it is recommended to clear the error code and reset the OBDII system after repairing the issue to ensure that the repair was successful and the code does not reoccur.
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