P1A99 Chevrolet 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
- P1A99 Chevrolet 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 P1A99 Chevrolet 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 P1A99 Chevrolet?
- 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 P1A99 Chevrolet?
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 P1A99 Chevrolet 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 P1A99 Chevrolet Code
1. What are the common symptoms of OBDII code P1A99 in a Chevrolet related to the Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current?
- Common symptoms include a check engine light, reduced vehicle performance, and potentially issues with starting the vehicle.
2. What are some possible causes of OBDII code P1A99 in a Chevrolet related to the Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current?
- Possible causes include a faulty hybrid battery current sensor, issues with the starter/generator control module, wiring or connection problems, or a malfunction in the hybrid battery system.
3. How can I diagnose OBDII code P1A99 in a Chevrolet related to the Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current?
- Diagnosis typically involves using a scan tool to retrieve the fault code, checking the hybrid battery current sensor for proper operation, inspecting wiring and connections, and testing the starter/generator control module.
4. What are some repair tips for fixing OBDII code P1A99 in a Chevrolet related to the Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current?
- Repair tips may include checking and repairing any damaged wiring or connections, replacing the hybrid battery current sensor if faulty, and ensuring the starter/generator control module is functioning correctly.
5. Is it safe to continue driving my Chevrolet with OBDII code P1A99 related to the Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current?
- It is not recommended to continue driving the vehicle with this fault code present, as it can lead to further damage to the hybrid system and potentially affect the vehicle's performance.
6. Can I reset the OBDII code P1A99 in my Chevrolet related to the Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current?
- While you can clear the fault code using a scan tool, it is important to address the underlying issue causing the code before resetting it to prevent future problems.
7. How much does it typically cost to repair OBDII code P1A99 in a Chevrolet related to the Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current?
- Repair costs can vary depending on the specific issue causing the fault code, but it is advisable to consult a professional mechanic for an accurate diagnosis and cost estimate.
8. Are there any recalls or service bulletins related to OBDII code P1A99 in Chevrolet vehicles with the Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current?
- It is recommended to check with Chevrolet dealerships or online resources for any recalls or service bulletins related to this specific fault code to see if there are any known issues or remedies available.
9. Can a DIY enthusiast with automotive experience fix OBDII code P1A99 in a Chevrolet related to the Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current?
- Depending on the skill level and experience of the DIY enthusiast, some may be able to diagnose and repair simple issues related to this fault code. However, due to the complexity of hybrid systems, it is often best to consult a professional mechanic for proper diagnosis and repair.
10. Will OBDII code P1A99 in a Chevrolet related to the Starter/Generator Control Module Hybrid Battery Current Sensor Circuit Low Current affect fuel efficiency?
- Since this fault code is related to the hybrid system and not directly tied to fuel management, it may not have a significant impact on fuel efficiency. However, it is still important to address the issue promptly to avoid potential complications.
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