AutoCodes – Generic – P085D

P085D Code - Gear Shift Control Module 'A' Performance

Quick Answer

The Engine Control Module (ECM) monitors the Gear Shift Control Module. Common causes include Faulty Gear Shift Control Module 'B', Gear Shift Control Module 'B' harness is open or shorted, Gear Shift Control Module 'B' 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: P085D indicates Gear Shift Control Module 'A' Performance.
Common causes: Common causes include Faulty Gear Shift Control Module 'B', Gear Shift Control Module 'B' harness is open or shorted, Gear Shift Control Module 'B' 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 12,884

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 May 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P085D Description

The Engine Control Module (ECM) monitors the Gear Shift Control Module. The ECM sets the OBDII when there is a problem communicating with the Gear Shift Control Module.

OBDII Code P085D - Gear Shift Control Module 'A' Performance - AutoCodes.com — P085D Code - Gear Shift Control Module 'A' Performance

What does this mean?

What are the Possible Causes of the DTC P085D?

Faulty Gear Shift Control Module 'B'
Gear Shift Control Module 'B' harness is open or shorted
Gear Shift Control Module 'B' circuit poor electrical connection

How to Fix the DTC P085D?

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 P085D 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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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 P085D Code

1. What are the common symptoms of OBDII code P085D (Gear Shift Control Module 'A' Performance)?

- Common symptoms include issues with shifting gears, difficulty changing gears, and potentially a warning light on the dashboard.

2. What are some possible causes of OBDII code P085D?

- Possible causes include a malfunctioning gear shift control module, faulty wiring or connectors, low transmission fluid levels, or a damaged transmission.

3. How serious is OBDII code P085D (Gear Shift Control Module 'A' Performance)?

- This code should be addressed promptly as it can lead to difficulties in shifting gears, potentially causing safety hazards on the road.

4. Can I continue driving with OBDII code P085D present?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the transmission or other components.

5. How can I diagnose and repair OBDII code P085D?

- Diagnosis typically involves inspecting the gear shift control module, checking for wiring issues, and ensuring proper transmission fluid levels. Repair may involve replacing the control module or addressing any wiring problems.

6. Will resetting the OBDII code P085D resolve the issue?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the code to trigger. Proper diagnosis and repair are necessary.

7. How much does it cost to fix OBDII code P085D?

- The cost of fixing this code can vary depending on the specific underlying issue, but it may involve the cost of a new gear shift control module, wiring repairs, and labor fees.

8. Can a DIY enthusiast fix OBDII code P085D at home?

- While some DIY enthusiasts may have the skills to diagnose and repair this code, it is recommended to seek professional help, especially when dealing with transmission-related issues.

9. Are there any preventive measures to avoid OBDII code P085D in the future?

- Regular maintenance of the transmission, checking for any wiring issues, and promptly addressing any shifting problems can help prevent the occurrence of this code.

10. How long does it take to fix OBDII code P085D?

- The time to fix this code can vary depending on the specific issue, availability of parts, and the expertise of the technician. It may take a few hours to a day to complete the repair.