P1A84 Cadillac Code - Starter/Generator Control Module Coolant Level Sensor 3 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
- P1A84 Cadillac indicates Starter/Generator Control Module Coolant Level Sensor 3 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 P1A84 Cadillac Description
What are the Possible Causes of the DTC P1A84 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 P1A84 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 P1A84 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 P1A84 Cadillac Code
1. What does the OBDII code P1A84 mean on a Cadillac?
The P1A84 code indicates an issue with the Starter/Generator Control Module Coolant Level Sensor 3, specifically detecting a high voltage condition.
2. What are the common symptoms of the P1A84 code?
Common symptoms include an illuminated check engine light, reduced hybrid or electric system performance, and potential overheating of the starter/generator module.
3. What causes the P1A84 code to appear?
This code is typically caused by a faulty coolant level sensor, issues with the sensor wiring or connectors, low coolant levels, or a malfunction in the Starter/Generator Control Module.
4. Can low coolant levels trigger the P1A84 code?
Yes, low coolant levels in the system can cause the sensor to read incorrectly, leading to the P1A84 code.
5. How can I diagnose the P1A84 code?
Start by checking the coolant level and inspecting the coolant level sensor for damage. Use a multimeter to test the sensor and wiring for proper voltage and continuity.
6. Can a faulty Starter/Generator Control Module cause the P1A84 code?
Yes, if the module itself is malfunctioning, it may incorrectly interpret or send signals, triggering the P1A84 code.
7. Is it safe to drive with the P1A84 code on a Cadillac?
Driving with this code is not recommended, as it may lead to overheating or reduced performance of the hybrid/electric system.
8. How do I fix the P1A84 code?
Repairs may include refilling coolant to the proper level, repairing or replacing the coolant level sensor, fixing damaged wiring, or replacing the Starter/Generator Control Module if necessary.
9. How much does it cost to fix a P1A84 code?
Repair costs vary but can range from $50 to $300 for sensor replacement or coolant refilling, and up to $1,000 or more if the Starter/Generator Control Module needs replacement.
10. Can a software update resolve the P1A84 code?
In some cases, a software update for the vehicle's control systems may resolve the issue, but this depends on the specific Cadillac model and year.
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