P1A97 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 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 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?
- 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?
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 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
- P1A97 Buick — Starter/Generator Control Module Hybrid Battery Voltage Sensor Circuit Low Voltage
- P1A97 Cadillac — Starter/Generator Control Module Hybrid Battery Voltage Sensor Circuit Low Voltage
- P1A97 Chevrolet — Starter/Generator Control Module Hybrid Battery Voltage Sensor Circuit Low Voltage
- P1A97 GMC — Starter/Generator Control Module Hybrid Battery Voltage Sensor Circuit Low Voltage
- P1A97 Saturn — Starter/Generator Control Module Hybrid Battery Voltage Sensor Circuit Low Voltage
Frequently Asked Questions about P1A97 Code
What does the OBDII code P1A97 indicate?
The P1A97 code indicates a low voltage issue in the hybrid battery voltage sensor circuit related to the starter/generator control module.
What are the common symptoms of a P1A97 code?
Common symptoms include warning lights on the dashboard, reduced hybrid system performance, and difficulty starting the vehicle.
What can cause the P1A97 code to trigger?
Causes can include a faulty hybrid battery voltage sensor, damaged wiring or connectors in the voltage sensor circuit, or a malfunctioning starter/generator control module.
How can I diagnose the P1A97 code?
To diagnose the P1A97 code, check the hybrid battery voltage sensor and its connections for damage, test the voltage output from the sensor, and inspect the starter/generator control module for faults.
Are there any safety concerns associated with the P1A97 code?
Yes, since this code relates to the hybrid battery system, it is important to handle repairs with care due to the high voltage involved. It’s advisable to consult a professional technician.
What are some potential repair solutions for a P1A97 code?
Potential repairs may include replacing the hybrid battery voltage sensor, repairing damaged wiring or connectors, or replacing the starter/generator control module if found defective.
Can I clear the P1A97 code without fixing the problem?
While you can clear the code using an OBDII scanner, it is not recommended as the underlying issue may cause further problems or affect vehicle performance.
Will the P1A97 code affect fuel efficiency?
Yes, if the hybrid system is not functioning properly due to this code, it can lead to decreased fuel efficiency and overall performance of the vehicle.
How much will it cost to repair a P1A97 code?
Repair costs can vary widely based on the cause of the issue, but expect to spend anywhere from $100 to $1,000, depending on whether it involves simple wiring repairs or replacement of major components.
Discuss the causes and fixes for P1A97 OBDII Code
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