P1A96 GMC Code - DC/DC Converter Stuck in 42-14 Volt Direction
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 a 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
- P1A96 GMC indicates DC/DC Converter Stuck in 42-14 Volt Direction.
- 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 P1A96 GMC 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 P1A96 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 P1A96 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 P1A96 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.
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Frequently Asked Questions about P1A96 GMC Code
1. What does the OBDII code P1A96 mean on a GMC vehicle?
P1A96 indicates that the DC/DC converter in the vehicle's hybrid or electrical system is stuck in the 42-14 volt direction, meaning it is not functioning as intended to regulate voltage.
2. What are the common symptoms of a P1A96 code?
Symptoms may include the check engine light or hybrid system warning light turning on, reduced performance of electrical components, dimming or flickering lights, and potential battery charging issues.
3. What causes the P1A96 code to appear?
This code is often caused by a malfunction in the DC/DC converter, wiring issues like damaged or corroded connections, a faulty control module, or software-related glitches.
4. Can I drive my GMC with a P1A96 code?
It is not recommended to drive for extended periods with this code, as it may lead to further electrical problems or reduce the vehicle's ability to maintain proper voltage levels.
5. How is the P1A96 code diagnosed?
A technician will use a scan tool to confirm the code, inspect the DC/DC converter and its wiring connections, and check for related faults in the hybrid or electrical system.
6. What repairs are typically needed to fix the P1A96 code?
Repairs may include replacing the DC/DC converter, repairing or replacing damaged wiring or connectors, updating control module software, or replacing the control module if faulty.
7. How much does it cost to fix a P1A96 code?
Repair costs can vary widely, ranging from $300 to $1,500 or more, depending on whether the DC/DC converter or control module requires replacement.
8. Can a dead 12V battery cause the P1A96 code?
While a weak or dead 12V battery may not directly cause the code, it can strain the DC/DC converter and contribute to system malfunctions.
9. Is the P1A96 code covered under warranty for GMC vehicles?
If the vehicle is still under its hybrid or powertrain warranty, the repair may be covered. Check your warranty terms or consult your dealership for confirmation.
10. Can a software update resolve the P1A96 code?
In some cases, a software update for the control module may resolve the issue if the problem is related to system programming.
Discuss the causes and fixes for P1A96 GMC OBDII Code
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