Transmission Range Sensor Circuit High
The P2803 code indicates that the Transmission Range Sensor (TRS) circuit is reading a higher than expected voltage. This sensor tells the Transmission Control Module (TCM) which gear position (Park, Reverse, Neutral, Drive) is selected. A high voltage reading can be caused by a faulty sensor, wiring issues, or a short to power. This can lead to incorrect gear selection, starting issues, or transmission performance problems.
01. Most Common Causes
- Faulty transmission range sensor
- Short to voltage in sensor circuit
- Damaged wiring or connector
- Corroded terminals
02. Symptoms You Will Notice
- Check Engine Light on
- Transmission stuck in one gear
- Incorrect gear display on dashboard
- Engine starts in any gear
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect the TRS wiring and connector for damage or corrosion.
Step 3: Test the sensor voltage and resistance with a multimeter against manufacturer specs.
Step 4: Check for shorts to power or ground in the circuit.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. The transmission may not shift correctly, potentially causing unsafe driving conditions or further damage.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor, depending on the cause and vehicle.