P1A97 Buick 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 Buick 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 Buick 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 Buick?
- 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 Buick?
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 Buick 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 Buick Code
1. What does the OBDII code P1A97 mean for a Buick?
P1A97 indicates a low voltage issue in the hybrid battery voltage sensor circuit within the Starter/Generator Control Module.
2. What are the common symptoms of code P1A97 on a Buick?
Symptoms may include the check engine light or hybrid system warning light, reduced fuel efficiency, limited hybrid system functionality, or failure to start.
3. What causes the P1A97 code to appear?
Common causes include a faulty hybrid battery voltage sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning Starter/Generator Control Module.
4. Can code P1A97 cause drivability issues?
Yes, it can lead to reduced hybrid system performance, decreased fuel efficiency, or the vehicle operating solely on the internal combustion engine.
5. How is the P1A97 code diagnosed?
A technician will use a scan tool to confirm the code, inspect the voltage sensor circuit for damage, and test the hybrid battery voltage sensor for proper operation.
6. Is it safe to drive with the P1A97 code active?
Driving may be possible, but it is not recommended as it could lead to further damage to the hybrid system or reduced performance.
7. What repairs are typically needed to fix the P1A97 code?
Repairs may involve replacing the hybrid battery voltage sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the Starter/Generator Control Module.
8. How much does it cost to fix the P1A97 code on a Buick?
Repair costs can vary widely depending on the specific issue, but they may range from $200 to $1,500 or more, especially if the module or hybrid battery components need replacement.
9. Can a dead hybrid battery trigger the P1A97 code?
A failing or improperly functioning hybrid battery could potentially contribute to the conditions that trigger the P1A97 code.
10. Can I clear the P1A97 code without fixing the issue?
Clearing the code without addressing the root cause will likely result in the code returning and may worsen the underlying problem.
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