P1A68 Code - Starter/Generator Control Module Programming Read Only Memory
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, harness is open or shorted, 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
- P1A68 indicates Starter/Generator Control Module Programming Read Only Memory.
- Common causes
- Common causes include Faulty, harness is open or shorted, 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 P1A68 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 starting 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 P1A68?
- Faulty
- harness is open or shorted
- circuit poor electrical connection
How to Fix the DTC P1A68?
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 P1A68 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
- P1A68 Buick — Starter/Generator Control Module Programming Read Only Memory
- P1A68 Cadillac — Starter/Generator Control Module Programming Read Only Memory
- P1A68 Chevrolet — Starter/Generator Control Module Programming Read Only Memory
- P1A68 GMC — Starter/Generator Control Module Programming Read Only Memory
- P1A68 Saturn — Starter/Generator Control Module Programming Read Only Memory
Frequently Asked Questions about P1A68 Code
What does the OBDII code P1A68 indicate?
The OBDII code P1A68 indicates a problem with the Starter/Generator Control Module's programming Read Only Memory (ROM), which affects the vehicle's start/stop system and overall hybrid operation.
What are common symptoms of a P1A68 code?
Common symptoms include warning lights on the dashboard (especially the check engine light), reduced engine performance, issues with starting the vehicle, and erratic behavior of the start/stop system.
What causes the P1A68 code to trigger?
The P1A68 code can be triggered by issues such as software corruption in the Starter/Generator Control Module, electrical faults, wiring problems, or failure of the module itself.
Can I drive my vehicle with a P1A68 code?
While it may be possible to drive the vehicle, it is not recommended as it can lead to further damage and may affect the vehicle's performance and fuel efficiency.
How can I diagnose a P1A68 code?
To diagnose a P1A68 code, use an OBDII scanner to confirm the code, inspect the Starter/Generator Control Module and related wiring for damage, and check for other related codes that may provide additional context.
What repairs can fix a P1A68 code?
Repairs may include reprogramming or updating the Starter/Generator Control Module software, replacing the module if it is faulty, or repairing any damaged wiring or connections.
Is it necessary to reset the code after repairs?
Yes, after performing repairs, it is essential to clear the code using an OBDII scanner and then perform a test drive to ensure the issue has been resolved and the code does not return.
Can I fix the P1A68 code myself?
If you have experience with automotive diagnostics and repairs, you may attempt to resolve the issue; however, reprogramming the module often requires specialized equipment and knowledge.
What should I do if the P1A68 code keeps coming back?
If the P1A68 code keeps returning after repairs, it is advisable to consult a professional mechanic for a thorough diagnosis, as there may be underlying issues that need to be addressed.
Discuss the causes and fixes for P1A68 OBDII Code
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