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P0986 Toyota Code - Shift Solenoid 'E' Control Circuit High

Quick Answer

The P0986 diagnostic trouble code (DTC) for Toyota vehicles indicates a problem with the Shift Solenoid 'E' control circuit being detected as high. Common causes include Faulty Shift Solenoid 'E', Wiring or connector issues in the Shift Solenoid 'E' control circuit, Low transmission fluid level or contaminated transmission fluid. 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
P0986 Toyota indicates Shift Solenoid 'E' Control Circuit High.
Common causes
Common causes include Faulty Shift Solenoid 'E', Wiring or connector issues in the Shift Solenoid 'E' control circuit, Low transmission fluid level or contaminated transmission fluid.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0986 Toyota Description

The P0986 diagnostic trouble code (DTC) for Toyota vehicles indicates a problem with the Shift Solenoid 'E' control circuit being detected as high. This specific solenoid is responsible for controlling the transmission's gear shifting process. When the PCM (Powertrain Control Module) detects that the voltage in the control circuit for Shift Solenoid 'E' is higher than the specified range, it triggers the P0986 code to be stored in the vehicle's computer system.

OBDII Code P0986 Toyota - Shift Solenoid 'E' Control Circuit High
P0986 Toyota Code - Shift Solenoid 'E' Control Circuit High

Common Causes of P0986 Toyota

  1. Faulty Shift Solenoid 'E'
  2. Wiring or connector issues in the Shift Solenoid 'E' control circuit
  3. Low transmission fluid level or contaminated transmission fluid
  4. Electronic control module (ECM) failure
  5. Mechanical issues in the transmission system

Symptoms of P0986 Toyota

  1. Harsh or delayed shifting
  2. Erratic transmission behavior
  3. Transmission slipping
  4. Transmission failure to shift gears
  5. Check Engine Light illuminated on the dashboard

How to Fix P0986 Toyota

  1. Use a scan tool to retrieve the P0986 code and further diagnose the issue.
  2. Inspect the Shift Solenoid 'E' and its wiring for any visible damage or signs of wear.
  3. Test the Shift Solenoid 'E' for proper functionality using a multimeter.
  4. Replace the Shift Solenoid 'E' if it is found to be faulty.
  5. Clear the code from the PCM's memory and test drive the vehicle to ensure the issue is resolved.

Cost to Fix P0986 Toyota

The cost of repairing the Shift Solenoid 'E' control circuit high issue can vary depending on the exact cause of the problem and the labor rates in your area. As a rough estimate, the parts cost for a new Shift Solenoid 'E' can range from $50 to $150, while the labor cost for the repair can be between $100 and $300. Overall, the total repair cost may range from $150 to $450. It is advisable to contact local auto repair shops for specific pricing information based on your vehicle make and model.

What does this mean?

Tech Notes for P0986 Toyota

There is a Factory Service Bulletin for the 2004 Toyota Sienna

2004 Toyota Sienna Factory Service Bulletin OBDII Code P0986

When is the Code Detected?

Engine Control Module (ECM) detectes an open or shorted condition on the solenoid circuit

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Information for Specific Toyota Models

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.

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