AutoCodes – Generic – P1586

P1586 Code - MT/AT Encoding Signal Malfunction

Quick Answer

Vehicles have many options in one type of Engine Control Module (ECM). Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM 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
P1586 indicates MT/AT Encoding Signal Malfunction.
Common causes
Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 33,746
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 20, 2019
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Code P1586 Description

Vehicles have many options in one type of Engine Control Module (ECM). So automatic recognition function is applied. The options that can be recognized are MT/AT, 2/4WD, DPF, etc). When a ECM is installed to vehicle, these options recognition are performed by the ECM automatically as checking whether ground line is grounded or opened every IG KEY ON process.
If this recognition is not fulfilled well or any error occurs during the process, engine power generation is not sufficient and glow lamp on cluster blinks.
If a system is installed, the ECM connector is grounded.
OBDII Code P1586 - MT/AT Encoding Signal Malfunction - AutoCodes.com
P1586 Code - MT/AT Encoding Signal Malfunction

What are the Possible Causes of the DTC P1586?

  • Faulty Engine Control Module (ECM)
  • ECM harness is open or shorted
  • ECM circuit poor electrical connection

How to Fix the DTC P1586?

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 P1586 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 P1586 code?

Need more information on how to fix the P1586 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1586 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

  • P1586 Audi β€” Engine Mounting Control Solenoid Bank 1 & 2 Short To Positive
  • P1586 Buick β€” Cruise Control Brake Switch 2 Circuit Conditions
  • P1586 Cadillac β€” Cruise Control Brake Switch 2 Circuit Conditions
  • P1586 Chevrolet β€” Cruise Control Brake Switch 2 Circuit Conditions
  • P1586 Ford β€” Throttle Control Unit Throttle Position Malfunction
  • P1586 GMC β€” Cruise Control Brake Switch 2 Circuit Conditions
  • P1586 Honda β€” Motor Power Inverter Module Current Signal/Battery Current Signal Circuit Problem
  • P1586 Hyundai β€” MT/AT Encoding Signal Malfunction
  • P1586 KIA β€” MT/AT Encoding Signal Malfunction
  • P1586 Volkswagen β€” Engine Mounting Control Solenoid Bank 1 & 2 Short To Positive
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 P1586 Code

1. What are the common symptoms of OBDII code P1586 (MT/AT Encoding Signal Malfunction)?

- Common symptoms include issues with shifting gears, hesitation during acceleration, and illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code P1586?

- Possible causes of this code include faulty transmission sensors, wiring issues, or a malfunctioning transmission control module.

3. How can I diagnose the MT/AT Encoding Signal Malfunction related to code P1586?

- Diagnosis typically involves using a scan tool to check for the specific fault codes, inspecting the transmission wiring, and testing the transmission sensors for proper functionality.

4. Can a DIY enthusiast repair OBDII code P1586 at home?

- While some simple repairs like checking and cleaning connectors or replacing damaged wiring can be done at home, diagnosing and repairing complex transmission issues may require professional help.

5. Is it safe to continue driving with OBDII code P1586 active?

- It is not recommended to drive with this code active, as it can lead to further transmission damage and potentially unsafe driving conditions.

6. How much does it typically cost to repair OBDII code P1586?

- The cost of repairing this code can vary depending on the exact cause of the issue, but it may range from $100 for simple fixes to several hundred dollars for more complex repairs.

7. Can resetting the OBDII code P1586 solve the issue temporarily?

- Resetting the code may temporarily turn off the warning light, but it will not fix the underlying issue causing the malfunction.

8. What are some preventive maintenance tips to avoid OBDII code P1586 in the future?

- Regularly checking and maintaining the transmission system, conducting timely fluid changes, and addressing any warning signs promptly can help prevent this code from appearing.

9. How long does it take to repair OBDII code P1586?

- The repair time can vary depending on the complexity of the issue and the availability of parts, but it may take a few hours to a day for a professional technician to diagnose and fix the problem.

10. Can extreme weather conditions contribute to the occurrence of OBDII code P1586?

- Yes, extreme temperatures or harsh weather conditions can sometimes exacerbate existing transmission issues, leading to the activation of this code.

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