P1A68 Chevrolet 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 Chevrolet 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 Chevrolet 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 Chevrolet?
- Faulty
- harness is open or shorted
- circuit poor electrical connection
How to Fix the DTC P1A68 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 P1A68 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 P1A68 Chevrolet Code
1. What does the OBDII code P1A68 mean on a Chevrolet?
P1A68 indicates an issue with the Starter/Generator Control Module Programming Read Only Memory (PROM), which may involve corrupted or invalid software.
2. What are the common symptoms of the P1A68 code?
Symptoms may include illuminated check engine light, reduced engine performance, failure to start, or issues with hybrid system functionality if applicable.
3. What causes the P1A68 code to trigger?
The code is usually triggered by a software issue in the Starter/Generator Control Module, such as corrupted programming, improper updates, or hardware failure in the module.
4. Can the P1A68 code cause drivability issues?
Yes, it can cause problems such as poor engine response, lack of hybrid system operation, or failure to start depending on the severity of the issue.
5. How is the P1A68 code diagnosed?
A technician will use a scan tool to verify the code, check for related software or module issues, and ensure the Starter/Generator Control Module is properly updated and functional.
6. How do you fix the P1A68 code on a Chevrolet?
The issue is typically resolved by reprogramming or updating the Starter/Generator Control Module software using a GM-approved software update tool.
7. Can hardware failure cause the P1A68 code?
Yes, although less common, a failure in the Starter/Generator Control Module itself might also cause this code.
8. Do you need to replace the Starter/Generator Control Module for P1A68?
Replacement is only necessary if reprogramming or software updates fail to resolve the issue or if the module is physically damaged.
9. Can I drive my Chevrolet with the P1A68 code?
It’s not recommended to drive with this code active, as it could affect engine or hybrid system performance and worsen the issue.
10. How much does it cost to repair the P1A68 code?
Repair costs vary, but reprogramming the module typically costs $100–$200. If the module needs replacement, the cost could exceed $1,000 including parts and labor.
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