P1A9A GMC Code - Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current
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
- P1A9A GMC indicates Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current.
- 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 P1A9A 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 P1A9A 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 P1A9A 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 P1A9A 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.
Need more information about the P1A9A GMC code?
Need more information on how to fix the P1A9A GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1A9A GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1A9A GMC Code
1. What are the common symptoms of OBDII code P1A9A in a GMC vehicle?
- Common symptoms include reduced engine power, difficulty starting the vehicle, and illuminated warning lights on the dashboard.
2. What is the main cause of OBDII code P1A9A related to the Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current?
- The main cause of this code is typically a malfunction or failure in the hybrid battery current sensor circuit.
3. How can I diagnose the issue related to OBDII code P1A9A in my GMC vehicle?
- Diagnosing the issue often involves using a diagnostic scanner to retrieve the trouble codes, checking the hybrid battery current sensor circuit for continuity and proper voltage, and inspecting for any loose connections or damaged wiring.
4. Can I continue to drive my GMC vehicle with OBDII code P1A9A present?
- It is not recommended to continue driving your vehicle with this code present, as it can lead to further damage to the hybrid system components.
5. What are some repair tips for resolving OBDII code P1A9A in a GMC vehicle?
- Repair tips may include checking and repairing any damaged wiring, ensuring proper connections in the hybrid battery current sensor circuit, and potentially replacing the faulty sensor if necessary.
6. Is it safe to attempt a DIY repair for OBDII code P1A9A, or should I seek professional help?
- Due to the complexity of hybrid vehicle systems, it is generally recommended to seek professional help when dealing with OBDII code P1A9A to ensure proper diagnosis and repair.
7. Can a low or weak hybrid battery cause OBDII code P1A9A to trigger in a GMC vehicle?
- Yes, a low or weak hybrid battery can potentially cause this code to trigger, as it may affect the functionality of the hybrid battery current sensor circuit.
8. How can I prevent OBDII code P1A9A from recurring in my GMC vehicle?
- Regular maintenance of the hybrid system, including checking the hybrid battery and related components, can help prevent the recurrence of this code.
9. Are there any recalls or technical service bulletins related to OBDII code P1A9A in GMC vehicles?
- It is recommended to check with a GMC dealership or the manufacturer's website for any recalls or technical service bulletins related to this specific OBDII code.
10. What is the typical cost to repair OBDII code P1A9A in a GMC vehicle?
- The cost of repairing this code can vary depending on the extent of the issue, the parts needed for replacement, and labor costs. It is advisable to obtain quotes from reputable repair shops or dealerships for an accurate estimate.
Discuss the causes and fixes for P1A9A GMC OBDII Code
Code P1A9A GMC 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.
