AutoCodes – Generic – P186C

P186C Code - High Side 3 System Short To Power Supply

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 short to the power supply. 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: P186C indicates High Side 3 System Short To Power Supply.
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 3,834

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 P186C 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 short to the power supply.

OBDII Code P186C - High Side 3 System Short To Power Supply - AutoCodes.com — P186C Code - High Side 3 System Short To Power Supply

What does this mean?

What are the Possible Causes of the DTC P186C?

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 P186C?

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 P186C 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 P186C code?

Need more information on how to fix the P186C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P186C code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P186C Mitsubishi — High Side 3 System Short To Power Supply

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 P186C Code

1. What are the common symptoms of OBDII code P186C (High Side 3 System Short To Power Supply)?

The common symptoms include engine misfires, rough idling, poor acceleration, and potential stalling.

2. What can cause the OBDII code P186C to trigger?

The code P186C is typically triggered by a short to power supply in the High Side 3 system, which may be caused by damaged wiring, a faulty high side driver module, or a malfunctioning sensor.

3. How serious is the OBDII code P186C issue?

While the code itself may not cause immediate harm to the vehicle, it can lead to poor engine performance and may result in further engine damage if left unresolved.

4. How can I diagnose the cause of OBDII code P186C (High Side 3 System Short To Power Supply)?

Diagnosing this issue involves checking the wiring harness for damage, testing the high side driver module, and inspecting the sensors related to the High Side 3 system.

5. Can I drive my vehicle with the OBDII code P186C present?

It is not recommended to drive the vehicle with this code present, as it can lead to performance issues and potentially cause further damage to the engine.

6. How can I repair OBDII code P186C?

Repairing this code may involve repairing or replacing damaged wiring, replacing the high side driver module, or addressing any issues with the sensors in the High Side 3 system.

7. Can a DIY enthusiast fix the OBDII code P186C issue?

While some experienced DIY enthusiasts may be able to diagnose and repair this issue, it is recommended to seek professional help to ensure the problem is properly resolved.

8. Will resetting the OBDII code P186C make it go away permanently?

Simply resetting the code will not fix the underlying issue causing P186C. It is important to diagnose and repair the root cause to prevent the code from reappearing.

9. How much can I expect to pay to fix OBDII code P186C at a repair shop?

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

10. Is it necessary to clear the OBDII code P186C after repairing the issue?

After fixing the underlying problem causing the code, it is recommended to clear the code using an OBDII scanner to ensure the issue has been successfully resolved.