P1A86 Chevrolet Code - Starter/Generator Control Module Coolant Level Sensor 4 High 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
- P1A86 Chevrolet indicates Starter/Generator Control Module Coolant Level Sensor 4 High 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 P1A86 Chevrolet Description
What are the Possible Causes of the DTC P1A86 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 P1A86 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 P1A86 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.
Need more information about the P1A86 Chevrolet code?
Need more information on how to fix the P1A86 Chevrolet code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1A86 Chevrolet code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1A86 Chevrolet Code
1. What does the OBDII code P1A86 mean on a Chevrolet?
P1A86 indicates an issue with the Starter/Generator Control Module (SGCM) Coolant Level Sensor 4, specifically detecting a high voltage condition.
2. What are the common symptoms of a P1A86 code?
Symptoms may include a check engine light, reduced hybrid system performance, overheating of the SGCM, or activation of limp mode.
3. What causes the P1A86 code to appear?
Common causes include a faulty coolant level sensor, low or contaminated coolant, damaged wiring or connectors, or a malfunction in the SGCM.
4. Can driving with a P1A86 code damage my vehicle?
Yes, ignoring the code can lead to overheating of the Starter/Generator Control Module, potentially causing costly repairs.
5. How do I fix the P1A86 code on a Chevrolet?
Repairs may involve checking and refilling the coolant, replacing the coolant level sensor, repairing wiring, or diagnosing the SGCM for internal faults.
6. How do I check the coolant level sensor for the P1A86 code?
Inspect the sensor for physical damage, ensure it’s properly connected, and use a multimeter to test its voltage and resistance readings.
7. Can low coolant trigger the P1A86 code?
Yes, low or insufficient coolant can cause the sensor to detect abnormal conditions, triggering the code.
8. How much does it cost to repair a P1A86 code?
Repair costs vary but typically range from $100 to $500, depending on whether the coolant level sensor, wiring, or SGCM needs service.
9. Can I clear the P1A86 code without fixing the problem?
While you can clear the code with an OBDII scanner, the issue will likely return unless the underlying problem is resolved.
10. Is the P1A86 code specific to hybrid or electric Chevrolet vehicles?
Yes, this code is generally associated with hybrid or electric Chevrolet models equipped with a Starter/Generator Control Module.
Discuss the causes and fixes for P1A86 Chevrolet OBDII Code
Code P1A86 Chevrolet comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
