Transmission Range Sensor Circuit Low
The P2802 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the transmission range sensor circuit. This sensor, also known as the neutral safety switch or manual lever position sensor, tells the PCM the gear selector position (Park, Reverse, Neutral, Drive, etc.). A low circuit voltage can be caused by a faulty sensor, damaged wiring, poor electrical connections, or a short to ground. This condition can lead to incorrect gear selection, starting issues, or transmission performance problems.
01. Most Common Causes
- Faulty transmission range sensor
- Damaged or corroded wiring/connectors in the sensor circuit
- Short to ground in the sensor signal circuit
- Low battery voltage or charging system issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission stuck in one gear or fails to shift properly
- Vehicle may not start or starts in wrong gear
- Erratic or incorrect gear position display on dashboard
03. 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 transmission range sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's voltage and ground circuits with a multimeter; compare readings to manufacturer specifications.
Step 4: If wiring is intact, replace the transmission range sensor and clear the code.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with a faulty transmission range sensor can cause unpredictable shifting, starting problems, or transmission damage. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
The typical repair cost ranges from $50 to $150 for parts and labor, depending on the vehicle and shop rates. The sensor itself is often inexpensive, but labor can vary.