P1A86 Cadillac 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 Cadillac 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 Cadillac Description
What are the Possible Causes of the DTC P1A86 Cadillac?
- 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 Cadillac?
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 Cadillac 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 P1A86 Cadillac Code
1. What does the OBDII code P1A86 mean for a Cadillac?
P1A86 indicates an issue with the Starter/Generator Control Module Coolant Level Sensor 4, specifically detecting a high voltage condition.
2. What are the common symptoms of the P1A86 code?
Symptoms may include an illuminated check engine light, reduced hybrid or electric system performance, or warning messages related to the cooling system.
3. What causes the P1A86 code to appear?
This code can be caused by a faulty coolant level sensor, wiring issues such as short circuits, a malfunctioning Starter/Generator Control Module, or low coolant levels.
4. Can low coolant levels trigger the P1A86 code?
Yes, low coolant levels can cause improper readings from the coolant level sensor, potentially triggering the P1A86 code.
5. How do you diagnose the P1A86 code?
Diagnosis typically involves scanning the vehicle with an OBDII tool, inspecting the coolant level sensor and its wiring, and checking the actual coolant level in the system.
6. Can you drive with the P1A86 code active?
Driving with this code is not recommended, as it may indicate a cooling issue that could lead to overheating or damage to the hybrid/electric system.
7. How is the P1A86 code repaired?
Repairs may include replacing the faulty coolant level sensor, fixing damaged wiring or connectors, topping off or flushing the coolant, or replacing the Starter/Generator Control Module if necessary.
8. Is the P1A86 code specific to Cadillacs with hybrid or electric systems?
Yes, this code is related to the Starter/Generator Control Module, which is typically found in hybrid or electric Cadillac vehicles.
9. How much does it cost to fix the P1A86 code?
Repair costs can vary widely, from $100 for a sensor replacement to over $1,000 if the Starter/Generator Control Module needs to be replaced.
10. Can a software update fix the P1A86 code?
In some cases, a software update to the Starter/Generator Control Module may resolve the issue if it’s caused by a programming error.
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