Gear Shift Position Circuit High
The P0917 code indicates that the powertrain control module (PCM) has detected a high voltage condition in the gear shift position circuit. This circuit is responsible for communicating the selected gear (Park, Reverse, Neutral, Drive) to the PCM. A high voltage reading typically suggests a short to power, a faulty sensor, or a wiring issue. This can lead to incorrect gear detection, affecting transmission operation and safety.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission stuck in one gear or fails to shift
- Incorrect gear display on dashboard
- Vehicle may not start or shift out of Park
- Reduced fuel economy
2. Most Common Causes
- Faulty gear shift position sensor
- Short to power in the sensor circuit
- Damaged wiring or connector
- Corroded terminals
- Faulty PCM (rare)
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for other related codes.
Step 2: Visually inspect the gear shift position sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor circuit voltage with a multimeter; compare to manufacturer specifications.
Step 4: Check for shorts to power by disconnecting the sensor and measuring voltage at the harness connector.
Step 5: If wiring and sensor are okay, test the PCM for proper operation (requires advanced diagnostic tools).
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The transmission may not shift correctly, potentially causing loss of control or damage to the transmission. Have the vehicle inspected immediately.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the cause. Replacing a sensor or repairing wiring is usually affordable.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.