P0915 Fault Code

Gear Shift Position Circuit Range/Performance

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

The P0915 fault code indicates a problem with the gear shift position circuit. This circuit is responsible for communicating the gear shift position from the transmission to the vehicle's engine control module (ECM). When the signal from the gear shift position sensor is outside of the expected range or has performance issues, this code is triggered.

Symptoms may include unexpected gear shifts, inability to shift into certain gears, or erratic shifting behavior, making the vehicle difficult to drive safely.

What are the symptoms of the P0915 code?

Drivers may notice several symptoms related to the P0915 code, such as:

• Erratic or delayed shifting between gears
• Warning lights illuminated on the dashboard, particularly the check engine light
• Inability to shift into certain gears, potentially leaving the vehicle stuck in one gear
• Unusual noises from the transmission indicating potential issues.
• The vehicle may enter 'limp mode', restricting its speed and gear functionality for safety.

What causes the P0915 code?

Common causes for the P0915 code include:

• Faulty gear shift position sensor
• Damaged wiring or poor connections in the shift position circuit
• Issues with the transmission control module (TCM)
• Transmission mechanical problems affecting gear engagement
• Software glitches within the vehicle’s ECM or TCM.

How to fix P0915?

To resolve the P0915 fault code, follow these steps:

• Begin by inspecting the wiring and connectors associated with the gear shift position circuit for damage or corrosion.
• Test and, if necessary, replace the gear shift position sensor.
• Check the transmission control module (TCM) for any fault codes and erratic behavior to diagnose potential software issues.
• If mechanical transmission problems are suspected, further inspection and possibly a rebuild may be needed.
• Always clear the fault codes after repairs and test drive the vehicle to ensure the issue is resolved and the code does not reoccur.