P2805 Fault Code

Transmission Range Sensor A/B Correlation

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

The P2805 fault code indicates a correlation issue between Transmission Range Sensor A and Sensor B. These sensors play a crucial role in determining the position of the transmission gear. If these sensors report conflicting information, the engine control unit (ECU) will set the P2805 code. This can lead to improper shifting or performance concerns in the vehicle.

What are the symptoms of the P2805 code?

Common symptoms associated with the P2805 code include:

• The vehicle may not shift properly between gears, leading to a rough driving experience.
• The check engine light may be illuminated on the dashboard.
• The vehicle may go into limp mode, restricting higher speeds to protect the transmission.
• Unusual noises or vibrations during shifting.

What causes the P2805 code?

Several factors can cause the P2805 code, including:

• Failing or malfunctioning transmission range sensors.
• Short circuits or open circuits in the wiring connecting the sensors to the ECU.
• Corroded electrical connectors.
• Issues with the transmission control module (TCM) or engine control module (ECM).
• Improper adjustments during previous repairs or maintenance.

How to fix P2805?

To resolve the P2805 fault code, consider the following steps:

1. Inspect the transmission range sensors for any visible damage or wear.
2. Check the wiring and connectors for signs of corrosion, damage, or loose connections.
3. Use a diagnostic scanner to compare the readings of both sensors and determine which one is faulty.
4. Replace any defective sensors and clear the fault codes.
5. If the issue persists, further inspection of the TCM or ECM may be necessary.