P2804 Fault Code

Transmission Range Sensor B Intermittent

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

The P2804 fault code indicates an issue with the Transmission Range Sensor B. This sensor is crucial for determining the position of the transmission range selector, which in turn ensures that the vehicle can start and shift properly. An intermittent fault in this sensor means that it is not consistently providing accurate signals, which can lead to various transmission issues.

What are the symptoms of the P2804 code?

Symptoms of a P2804 fault code can include:

• Difficulty in shifting gears or inability to enter certain gears.
• The vehicle may not start, or may exhibit erratic starting behavior.
• Transmission may go into limp mode, limiting performance to prevent damage.
• Dashboard warning lights related to the transmission system may illuminate.

What causes the P2804 code?

Several factors can lead to a P2804 code, including:

• A malfunctioning Transmission Range Sensor B due to wear or internal failure.
• Corroded connectors or wiring harness issues affecting sensor communication.
• Faulty transmission control module (TCM) that misinterprets signals.
• Software issues or glitches within the vehicle’s transmission system.

How to fix P2804?

To resolve a P2804 fault code, the following steps should be taken:

• Conduct a thorough inspection of the Transmission Range Sensor B, checking for damage or wear.
• Test the sensor and its connections for continuity and proper function.
• Repair or replace any damaged wiring or connectors.
• If the sensor is functioning properly, check the TCM for faults and update or reprogram software as necessary.
• Reset the fault codes after repairs and test drive the vehicle to ensure the issue is resolved.