P1A97 GMC Code - Starter/Generator Control Module Hybrid Battery Voltage Sensor Circuit Low Voltage
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 volts DC and 14 volts DC buses via the APM, bi-directional 42 volts DC to 14 volts DC converter. Common causes include Faulty Starter/Generator Control Module (SGCM), Starter/Generator Control Module (SGCM) harness is open or shorted, Starter/Generator Control Module (SGCM) 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
- P1A97 GMC indicates Starter/Generator Control Module Hybrid Battery Voltage Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty Starter/Generator Control Module (SGCM), Starter/Generator Control Module (SGCM) harness is open or shorted, Starter/Generator Control Module (SGCM) 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 P1A97 GMC Description
The Starter/Generator Control Module (SGCM) controls 2 functions in these DTCs. DC voltage is transformed into three phase AC power to the electric machine interface. In this case, energy flows from 36 volt to phase1, phase2 and phase3. The second case shall be generating, where the three phase AC power is used to charge the 36 volt battery pack. In this case, energy flows from phase1, phase2 and phase3 to 36 volts.
What are the Possible Causes of the DTC P1A97 GMC?
- Faulty Starter/Generator Control Module (SGCM)
- Starter/Generator Control Module (SGCM) harness is open or shorted
- Starter/Generator Control Module (SGCM) circuit poor electrical connection
How to Fix the DTC P1A97 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 P1A97 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 P1A97 GMC Code
1. What are the common symptoms of OBDII code P1A97 in a GMC vehicle?
- Common symptoms include poor fuel efficiency, reduced engine power, difficulty starting the vehicle, and the illumination of the check engine light.
2. What does the OBDII code P1A97 in a GMC indicate?
- This code indicates a problem with the Starter/Generator Control Module Hybrid Battery Voltage Sensor Circuit, specifically low voltage.
3. What are the possible causes of OBDII code P1A97 in a GMC related to the Hybrid Battery Voltage Sensor Circuit?
- Potential causes include a faulty hybrid battery voltage sensor, damaged wiring or connectors in the circuit, or issues with the starter/generator control module.
4. How can I diagnose the cause of OBDII code P1A97 in my GMC related to the Hybrid Battery Voltage Sensor Circuit?
- Diagnosis typically involves using a multimeter to test the voltage output of the hybrid battery voltage sensor, checking the wiring for damage, and inspecting the connections to the starter/generator control module.
5. Can I continue driving my GMC with OBDII code P1A97 present?
- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage and potentially leave you stranded if the issue worsens.
6. How can I repair OBDII code P1A97 in my GMC related to the Hybrid Battery Voltage Sensor Circuit?
- Repair typically involves replacing the faulty hybrid battery voltage sensor, repairing any damaged wiring or connectors, or addressing issues with the starter/generator control module.
7. Are there any DIY tips for addressing OBDII code P1A97 in a GMC?
- While some basic troubleshooting can be done, it is recommended to consult a professional mechanic with experience in hybrid vehicle systems to accurately diagnose and repair the issue.
8. How much does it typically cost to repair OBDII code P1A97 in a GMC at a dealership or repair shop?
- Repair costs can vary depending on the exact cause of the issue, but it is advisable to budget for several hundred dollars for parts and labor.
9. Can a faulty hybrid battery voltage sensor cause other problems in a GMC vehicle besides triggering OBDII code P1A97?
- Yes, a faulty hybrid battery voltage sensor can lead to issues with the vehicle's hybrid system performance, fuel efficiency, and overall drivability.
10. Is OBDII code P1A97 specific to GMC vehicles, or can it appear in other makes and models?
- While the specific code may be GMC-specific, similar issues related to the hybrid battery voltage sensor circuit can occur in other hybrid vehicles from different manufacturers.
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