AutoCodes – Generic – P186A

P186A Code - High Side 3 System Overcurrent

Quick Answer

The Twin Clutch Sportronic Shift Transmission (TC-SST) Electronic Control Unit (ECU) monitors the system and the supply current to the high side 3 is determined to be overcurrent. Common causes include Faulty Twin Clutch Sportronic Shift Transmission (TC-SST) Electronic Control Unit (ECU), TC-SST-ECU harness is open or shorted, TC-SST-ECU 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: P186A indicates High Side 3 System Overcurrent.
Common causes: Common causes include Faulty Twin Clutch Sportronic Shift Transmission (TC-SST) Electronic Control Unit (ECU), TC-SST-ECU harness is open or shorted, TC-SST-ECU 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.

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Code Popularity 2,869

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P186A Description

The Twin Clutch Sportronic Shift Transmission (TC-SST) Electronic Control Unit (ECU) monitors the system and the supply current to the high side 3 is determined to be overcurrent.

OBDII Code P186A - High Side 3 System Overcurrent - AutoCodes.com — P186A Code - High Side 3 System Overcurrent

What does this mean?

What are the Possible Causes of the DTC P186A?

Faulty Twin Clutch Sportronic Shift Transmission (TC-SST) Electronic Control Unit (ECU)
TC-SST-ECU harness is open or shorted
TC-SST-ECU circuit poor electrical connection

How to Fix the DTC P186A?

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 P186A 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 P186A code?

Need more information on how to fix the P186A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P186A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P186A Mitsubishi — High Side 3 System Overcurrent

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P186A Code

1. What are common symptoms of OBDII code P186A (High Side 3 System Overcurrent)?

The common symptoms of this code may include the illumination of the check engine light, reduced engine performance, and potential issues with the transmission.

2. What are the possible causes of OBDII code P186A?

Possible causes of code P186A may include a malfunctioning high side driver circuit, a short circuit in the high side driver circuit, or a faulty transmission control module.

3. Can driving with OBDII code P186A cause further damage to the vehicle?

Continuing to drive with code P186A may lead to further damage to the transmission or other related components, so it is recommended to address the issue promptly.

4. How can I diagnose OBDII code P186A?

Diagnosing code P186A usually involves using a diagnostic scanner to retrieve the code, inspecting the high side driver circuit, and testing the transmission control module for faults.

5. What are some repair tips for resolving OBDII code P186A?

Repair tips for resolving code P186A may include repairing or replacing the high side driver circuit, addressing any short circuits, and ensuring proper functioning of the transmission control module.

6. Can a DIY enthusiast fix OBDII code P186A at home?

While some aspects of addressing code P186A may be tackled by experienced DIY enthusiasts, it is recommended to seek professional help for a thorough diagnosis and repair to ensure the issue is resolved correctly.

7. How much does it typically cost to repair OBDII code P186A?

The cost of repairing code P186A can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Is it safe to drive my vehicle with OBDII code P186A if it seems to be running fine?

Even if your vehicle seems to be running fine with code P186A, it is advisable to address the underlying issue promptly to prevent potential damage and ensure optimal performance.

9. Will resetting the OBDII system clear code P186A?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing P186A is not addressed, the code is likely to reappear once the problem resurfaces.

10. How urgent is it to address OBDII code P186A?

It is recommended to address code P186A as soon as possible to prevent potential damage to the transmission system and ensure the overall health and performance of your vehicle.