P1A93 Code - 14-Volt Power Module Stuck OFF
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 V DC and 14 V DC buses via the APM, bi-directional 42 V DC to 14 V 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
- P1A93 indicates 14-Volt Power Module Stuck OFF.
- 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 P1A93 Description
When the APM Power Conversion direction is set to a value of 42 V to 14 V, the energy will flow from the 42 V DC Bus to the 14 V DC Bus via the APM. When the Service Charge or jump start is requested, the energy will flow from the 14 V DC Bus to the 42 V DC Bus via the APM. When the APM Power Conversion direction is set to a value of Off, the APM will be turned OFF and not consume or transfer any power. When the APM Power Conversion direction is set to a value of Invalid, the energy will flow from the 42 V DC Bus to the 14 V DC Bus via the APM.
What are the Possible Causes of the DTC P1A93?
- 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 P1A93?
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 P1A93 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
- P1A93 Buick — 14-Volt Power Module Stuck OFF
- P1A93 Cadillac — 14-Volt Power Module Stuck OFF
- P1A93 Chevrolet — 14-Volt Power Module Stuck OFF
- P1A93 GMC — 14-Volt Power Module Stuck OFF
- P1A93 Saturn — 14-Volt Power Module Stuck OFF
Frequently Asked Questions about P1A93 Code
1. What are the common symptoms of OBDII code P1A93 (14-Volt Power Module Stuck OFF)?
- Common symptoms include issues with starting the vehicle, dimming or flickering lights, and loss of power to certain electrical components.
2. What are the possible causes of OBDII code P1A93 (14-Volt Power Module Stuck OFF)?
- The code may be triggered by a faulty 14-volt power module, damaged wiring or connectors, a blown fuse, or a problem with the vehicle's battery.
3. How can I diagnose the cause of OBDII code P1A93 (14-Volt Power Module Stuck OFF)?
- A thorough inspection of the 14-volt power module, wiring, connectors, fuses, and battery should be conducted. A multimeter can be used to test for continuity and voltage.
4. What are the repair options for OBDII code P1A93 (14-Volt Power Module Stuck OFF)?
- Repair options may include replacing the faulty 14-volt power module, repairing damaged wiring or connectors, replacing blown fuses, or addressing any issues with the vehicle's battery.
5. Can OBDII code P1A93 (14-Volt Power Module Stuck OFF) be reset without fixing the underlying issue?
- While the code can be cleared using an OBDII scanner, it is important to address the underlying issue causing the code to prevent further problems with the vehicle's electrical system.
6. Is it safe to continue driving with OBDII code P1A93 (14-Volt Power Module Stuck OFF) present?
- It is not recommended to continue driving with this code present, as it can lead to electrical problems that may affect the vehicle's performance and safety.
7. How much does it typically cost to repair OBDII code P1A93 (14-Volt Power Module Stuck OFF)?
- The cost of repairing this code can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.
8. Can a DIY enthusiast fix OBDII code P1A93 (14-Volt Power Module Stuck OFF) themselves?
- While some DIY enthusiasts may have the skills to diagnose and repair this code, it is recommended to consult a professional mechanic for complex electrical issues to ensure the problem is properly resolved.
9. Are there any preventive maintenance tips to avoid OBDII code P1A93 (14-Volt Power Module Stuck OFF)?
- Regularly inspecting the vehicle's electrical components, keeping the battery in good condition, and addressing any warning signs promptly can help prevent issues that may trigger this code.
10. How long does it typically take to repair OBDII code P1A93 (14-Volt Power Module Stuck OFF)?
- The repair time can vary depending on the cause of the issue and the availability of parts, but it may take a few hours to a full day to diagnose and fix the problem.
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