Gate Select Position Circuit High
The P0907 code indicates that the transmission control module (TCM) has detected a high voltage signal from the gate select position sensor circuit. This sensor monitors the position of the shift gate (e.g., Park, Reverse, Neutral, Drive) in automatic transmissions. A high voltage reading typically points to a short to power, a faulty sensor, or a wiring issue. This can cause incorrect gear selection or prevent the vehicle from starting.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission stuck in one gear or fails to shift
- Vehicle may not start or shift out of Park
- Erratic or incorrect gear display on dashboard
2. Most Common Causes
- Faulty gate select position sensor
- Short to power in the sensor circuit wiring
- Damaged connector or corroded terminals
- Faulty transmission control module (TCM)
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the gate select position sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's voltage reference and signal circuits using a multimeter; compare with manufacturer specifications.
Step 4: If wiring and sensor are okay, test the TCM for proper operation or perform a relearn procedure.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not recommended. The transmission may not shift correctly or could get stuck in gear, leading to unsafe driving conditions or transmission damage.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on whether the sensor or wiring needs replacement. Labor costs vary by shop.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.