P2803 Fault Code

Transmission Range Sensor B Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2803 code indicates an issue with the Transmission Range Sensor B Circuit. This sensor plays a crucial role in determining the current gear of the transmission, which is important for proper vehicle operation. When the circuit is registering a high signal, it can lead to transmission shifting problems or incorrect gear selection.

What are the symptoms of the P2803 code?

Symptoms associated with the P2803 code may encompass:

• Inability to shift into certain gears or slipping of transmission
• Erratic shifting or no response when shifting
• Check Engine Light illuminated on the dashboard
• Transmission overheating in severe cases
• Unusual noises coming from the transmission

What causes the P2803 code?

Common causes for this fault code may include:

• Faulty Transmission Range Sensor B
• Wiring issues, such as short circuits or damaged connections
• Poor electrical connection due to corrosion or dirt
• Malfunctioning Transmission Control Module (TCM)
• Low transmission fluid levels or contamination

How to fix P2803?

To resolve the P2803 code, follow these steps:

1. Inspect the wiring and connectors associated with the Transmission Range Sensor B for damage or corrosion.
2. Test the Transmission Range Sensor B for proper function using a multimeter.
3. Replace the sensor if it is confirmed to be faulty.
4. Check and refill transmission fluid to the correct level if necessary.
5. Clear the fault codes and perform a road test to ensure the issue is resolved.