P0908: Gate Select Position Circuit Intermittent
The P0908 code indicates an intermittent fault in the gate select position circuit, which is part of the transmission range sensor (also known as the neutral safety switch or manual shift shaft position sensor). This sensor tells the PCM which gear the driver has selected (Park, Reverse, Neutral, Drive, etc.). An intermittent signal can cause erratic shifting, starting issues, or transmission performance problems. The circuit may have a loose connection, damaged wiring, or a failing sensor.
01. Most Common Causes
- Faulty transmission range sensor
- Corroded or loose electrical connector
- Damaged wiring or short circuit
- Intermittent open or ground in the circuit
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine may not start or starts in wrong gear
- Erratic or harsh shifting
- Transmission stuck in limp mode
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect the transmission range sensor connector and wiring for damage, corrosion, or loose pins.
Step 3: Test the sensor's resistance and voltage according to manufacturer specifications.
Step 4: Check for intermittent continuity in the circuit by wiggling the harness while monitoring the signal.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. The intermittent circuit can cause sudden loss of gear selection, leading to unsafe driving conditions or transmission damage.
How much does it cost to fix?▼
Typically $50-$150 for diagnosis and repair, but if the sensor needs replacement, parts and labor can range from $100-$300.