Gear Shift Direction Circuit High Voltage
The P2795 code indicates that the powertrain control module (PCM) has detected a high voltage condition in the gear shift direction circuit. This circuit is responsible for communicating the driver's intended gear selection (e.g., forward or reverse) to the transmission control module. A high voltage reading suggests a short to power, a faulty sensor, or a wiring issue, which can lead to incorrect gear engagement or transmission malfunction.
1. Most Common Causes
- Faulty gear shift position switch
- Signal circuit shorted to battery voltage (B+)
- Damaged, corroded, or loose shift lever switch connector
- Open ground circuit in the sensor
- Internal transmission control module (TCM) failure
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission stuck in one gear or fails to shift
- Incorrect gear indication on dashboard
- Vehicle may not start or move in selected gear
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm code P2795 and check for additional codes.
Step 2: Visually inspect the gear shift direction circuit wiring and connectors for damage, corrosion, or shorts.
Step 3: Test the gear shift direction sensor/switch with a multimeter for proper voltage and resistance per manufacturer specs.
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, suspect a PCM/TCM issue and perform further diagnostics or reprogramming.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The transmission may not shift correctly, leading to loss of vehicle control or transmission damage. Have the vehicle towed to a repair shop.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the root cause. Sensor replacement may cost more if parts are expensive.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.