P2800 Fault Code

Transmission Range Sensor B Circuit (PRNDL Input)

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

The P2800 fault code indicates a problem with the Transmission Range Sensor B Circuit, also referred to as the PRNDL input. This sensor is responsible for detecting the position of the gear selector in automatic transmissions, relaying the information to the vehicle's engine control unit (ECU). If the ECU detects an inconsistency between the sensor's input and expected values, it triggers this fault code.

What are the symptoms of the P2800 code?

Drivers may experience various symptoms when the P2800 code is present, such as:

• Transmission not shifting properly between gears
• Inability to shift into certain gears or modes (e.g., reverse or park)
• Engine stalling when attempting to shift gears
• Warning lights illuminated on the dashboard, such as the check engine light.

What causes the P2800 code?

Several issues can cause the P2800 code to be triggered, including:

• A faulty Transmission Range Sensor B
• Damaged wiring or connectors within the circuit
• Poor electrical connections or corrosion
• Transmission fluid leakage affecting sensor functionality
• Problems within the transmission control module (TCM) itself.

How to fix P2800?

To resolve the P2800 fault code, follow these steps:

1. Perform a thorough visual inspection of the wiring and connectors leading to the Transmission Range Sensor B for any damages or signs of corrosion.
2. Test the Transmission Range Sensor B with a multimeter to ensure it is operating within the correct specifications.
3. Repair or replace any damaged wiring or connectors found during the inspection.
4. If the sensor is faulty, uninstall it and replace it with a new part.
5. Clear the fault codes from the ECU and perform a test drive to confirm the repair.