P0908 Fault Code

Gate Select Position Circuit Intermittent

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

The P0908 fault code refers to an issue with the Gate Select Position Circuit. This circuit plays a critical role in determining the current gear selection in automatic transmission systems. When the circuit is deemed intermittent, it can lead to miscommunication between the vehicle's transmission control module (TCM) and the actual gear selection sensor, causing erratic shifting behavior.

What are the symptoms of the P0908 code?

When the P0908 code is triggered, you may experience:

• Erratic or incorrect gear shifting, leading to a lack of performance.
• Difficulty in selecting the correct gear, leading to stalling or unexpected changes in speed.
• Activation of the check engine light on the dashboard.
• Potential increase in fuel consumption due to improper gear engagement.

What causes the P0908 code?

Several factors can cause the P0908 error code. Common causes include:

• Faulty gate select position sensor that may provide inconsistent readings.
• Damaged wiring or connectors in the circuit that can lead to short or open circuits.
• Corrosion at the sensor or connector, disrupting the electrical connection.
• Software issues within the TCM, which may result in improper gear selection interpretations.

How to fix P0908?

To resolve the P0908 fault code, the following steps should be taken:

• Conduct a thorough visual inspection of the gate select position sensor and its wiring for any visible damage or corrosion.
• Test the functionality of the gate select position sensor using a multimeter to ensure it sends correct signals.
• Repair or replace any damaged wiring or connectors found during inspection.
• If the sensor and wiring are in good condition, consider reprogramming or updating the TCM software, if applicable.