P1A97 Cadillac 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 Cadillac 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 Cadillac 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 Cadillac?
- 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 Cadillac?
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 Cadillac 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.
Need more information about the P1A97 Cadillac code?
Need more information on how to fix the P1A97 Cadillac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1A97 Cadillac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1A97 Cadillac Code
What does the OBDII code P1A97 mean on a Cadillac?
P1A97 indicates a low voltage issue in the hybrid battery voltage sensor circuit, specifically related to the Starter/Generator Control Module.
What are the common symptoms of code P1A97 in a Cadillac?
Symptoms may include the check engine light turning on, reduced hybrid system performance, poor fuel efficiency, or the vehicle entering limp mode.
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 issues with the Starter/Generator Control Module.
Can a weak hybrid battery trigger the P1A97 code?
Yes, a weak or failing hybrid battery can lead to voltage irregularities, potentially triggering this code.
How can I diagnose the P1A97 code?
Start by inspecting the wiring and connectors for damage or corrosion, then test the voltage sensor and related circuitry, and finally check for faults in the Starter/Generator Control Module.
Is the P1A97 code serious?
Yes, this code is considered serious as it can affect the hybrid system's performance and may prevent the vehicle from operating efficiently or safely.
Can I drive my Cadillac with the P1A97 code active?
It is not recommended to drive for extended periods with this code active, as it can lead to further damage or a breakdown of the hybrid system.
How is the P1A97 code repaired?
Repairs may involve replacing the hybrid battery voltage sensor, repairing or replacing damaged wiring, or reprogramming or replacing the Starter/Generator Control Module.
Can clearing the P1A97 code solve the problem?
Clearing the code may temporarily remove the check engine light, but the underlying issue must be addressed to prevent the code from returning.
How much does it cost to fix the P1A97 code on a Cadillac?
Repair costs vary depending on the specific issue, but replacing the voltage sensor or repairing wiring can cost $200-$500, while replacing the Starter/Generator Control Module can exceed $1,000.
Discuss the causes and fixes for P1A97 Cadillac OBDII Code
Code P1A97 Cadillac comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
