P0986 Fault Code

Shift Solenoid E Control Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0986 fault code is associated with the Shift Solenoid E Control Circuit High. This code indicates that the Engine Control Module (ECM) has detected a high voltage signal in the circuit controlling the shift solenoid E. This signal is crucial for proper gear shifting in automatic transmissions.

What are the symptoms of the P0986 code?

Symptoms associated with the P0986 fault code may include:

• Unexpected shifting behavior, such as harsh shifts or slipping of gears.
• Illuminated check engine light on the dashboard.
• Transmission may enter 'limp mode,' resulting in limited vehicle speed and functionality.
• Poor acceleration and decreased fuel efficiency due to improper shifting.

What causes the P0986 code?

Common causes for the P0986 code include:

• A faulty shift solenoid E, which may not be functioning properly.
• Wiring issues or short circuits within the solenoid circuit that can cause high resistance or grounding problems.
• Connectors that are loose, corroded, or damaged, affecting the electrical signal.
• A malfunctioning Engine Control Module (ECM) that misinterprets the signal.

How to fix P0986?

To resolve the P0986 fault code, the following steps should be taken:

• Inspect the wiring and connectors leading to the shift solenoid for any signs of damage or corrosion. Repair or replace as necessary.
• Test the shift solenoid E for proper operation and replace it if it is found to be defective.
• Check the Engine Control Module (ECM) for updates or faults; reprogram or replace if needed.
• Clear the fault code and perform a test drive to ensure the issue is resolved and the code does not return.