P1A64 Chevrolet Code - Starter/Generator Control Module Reset
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
- P1A64 Chevrolet indicates Starter/Generator Control Module Reset.
- 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 P1A64 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 P1A64 Chevrolet?
- Faulty
- harness is open or shorted
- circuit poor electrical connection
How to Fix the DTC P1A64 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 P1A64 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 P1A64 Chevrolet Code
1. What does the OBDII code P1A64 mean for a Chevrolet?
P1A64 indicates an issue with the Starter/Generator Control Module Reset, often related to hybrid or electric vehicle systems.
2. What are the common symptoms of code P1A64 in a Chevrolet?
Symptoms may include the check engine light turning on, reduced performance, failure to start, or issues with the hybrid/electric drive system.
3. What causes the P1A64 code to appear in a Chevrolet?
Common causes include software glitches, loose or corroded electrical connections, or a malfunction within the Starter/Generator Control Module itself.
4. Can I drive my Chevrolet with the P1A64 code active?
Driving may be possible, but it’s not recommended as it could lead to further damage, reduced performance, or safety concerns.
5. How is the P1A64 code diagnosed in a Chevrolet?
Technicians use a diagnostic scanner to confirm the code, inspect the Starter/Generator Control Module, and check for wiring or connection issues.
6. What repairs are needed to fix the P1A64 code?
Repairs may include updating the module’s software, repairing or replacing damaged wiring, or replacing the Starter/Generator Control Module.
7. Can a dead or weak battery cause the P1A64 code?
Yes, a weak 12V auxiliary battery or hybrid battery issue can trigger the P1A64 code due to inconsistent voltage supply.
8. How much does it cost to fix the P1A64 code on a Chevrolet?
Costs vary but may range from $150 for software updates to over $1,000 for module replacement, depending on parts and labor.
9. Can resetting the Starter/Generator Control Module clear the P1A64 code?
In some cases, a reset or software reflash can resolve the issue, but underlying problems must be addressed to prevent recurrence.
10. Is the P1A64 code specific to hybrid or electric Chevrolet vehicles?
Yes, it’s typically found in hybrid or electric Chevrolet models with a Starter/Generator Control Module integrated into their drivetrain.
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