P1A85 Chevrolet Code - Starter/Generator Control Module Coolant Level Sensor 4 Low Voltage
Quick Answer
The Starter/Generator Control Module (SGCM) electronics are immersed in an internal fluid to distribute the heat of the electronics evenly through the SGCM, this electronics internal fluid is not the coolant that is circulated through the SGCM cooling system. 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
- P1A85 Chevrolet indicates Starter/Generator Control Module Coolant Level Sensor 4 Low Voltage.
- 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 P1A85 Chevrolet Description
What are the Possible Causes of the DTC P1A85 Chevrolet?
- 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 P1A85 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 P1A85 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 P1A85 Chevrolet Code
1. What does the OBDII code P1A85 mean for a Chevrolet vehicle?
The P1A85 code indicates a low voltage issue with the Starter/Generator Control Module Coolant Level Sensor 4, which monitors the coolant level in the system to ensure proper operation.
2. What are the common symptoms of the P1A85 code?
Symptoms may include an illuminated Check Engine Light, reduced hybrid or electric performance, overheating of the starter/generator system, or erratic operation of hybrid components.
3. What causes the P1A85 code to appear?
Common causes include a faulty coolant level sensor, damaged wiring or connectors, low coolant levels, or an issue with the Starter/Generator Control Module itself.
4. Can I drive my Chevrolet with the P1A85 code active?
Driving with this code is not recommended, as it can lead to overheating or damage to the starter/generator system if the coolant level is truly low or the sensor is malfunctioning.
5. How do I diagnose the P1A85 code?
Diagnosis involves checking the coolant level, inspecting the wiring and connectors for damage, testing the coolant level sensor, and scanning for additional codes that could provide more context.
6. How do I fix the P1A85 code on my Chevrolet?
Repairs may include refilling the coolant, replacing the coolant level sensor, repairing or replacing damaged wiring, or addressing faults in the Starter/Generator Control Module.
7. What tools are needed to address the P1A85 code?
You’ll need an OBDII scanner, a multimeter to test electrical components, and basic tools for accessing and replacing sensors or wiring.
8. How much does it typically cost to fix the P1A85 code?
Repair costs can range from $50 to $300, depending on whether the issue is just low coolant or if the sensor or wiring needs replacement.
9. Can a low coolant level alone trigger the P1A85 code?
Yes, a low coolant level can trigger this code, as the sensor may detect insufficient coolant and interpret it as a fault.
10. Does the P1A85 code require reprogramming of the control module?
Reprogramming is typically not required unless the Starter/Generator Control Module itself is replaced or updated to resolve the issue.
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