P0920 Fault Code

Gear Shift Forward Actuator Circuit / Open [forward motion, odd gears, 1,3,5]

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

The P0920 fault code indicates an issue with the gear shift forward actuator circuit, which is responsible for managing the forward motion gear changes in an automatic transmission. This fault typically arises when there is an open circuit in the actuator that controls odd-numbered gears: 1, 3, and 5.

• The gear shift forward actuator is crucial for smooth transitions between these gears.
• Poor electrical connections or damaged wiring can lead to this fault.
• Ensuring the actuator is functioning optimally is essential for proper vehicle performance.

What are the symptoms of the P0920 code?

Drivers may notice several symptoms when the P0920 code is present, such as:

• Inability to shift into odd gears: 1, 3, and 5.
• Erratic transmission behavior, causing delays in shifting or harsh shifts.
• A potential warning light illuminating on the dashboard related to transmission issues.
• Reduced acceleration or performance due to improper gear engagement.

What causes the P0920 code?

Several factors can cause the P0920 fault code, including:

• Damaged or frayed wiring affecting the actuator circuit.
• A faulty gear shift forward actuator itself that has failed or malfunctioned.
• Poor electrical connections at the actuator or related components.
• Issues with the vehicle's transmission control module (TCM) that could send incorrect signals.

How to fix P0920?

To resolve the P0920 fault code, consider the following steps:

• Inspect the wiring and connectors for any damage or corrosion. Repair or replace as necessary.
• Test the gear shift forward actuator for proper operation; replace if faulty.
• Check the vehicle’s transmission control module (TCM) to ensure proper programming and operation.
• Clear the fault code and conduct a road test to confirm that the issue has been resolved.