P0820 Fault Code

Gear Lever X - Y Position Sensor Circuit

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

The P0820 fault code refers to an issue with the gear lever position sensor circuit, which is responsible for determining the current position of the gear lever in a vehicle's transmission system. This sensor plays a crucial role in ensuring that the correct gear is engaged for optimal performance and safety.

What are the symptoms of the P0820 code?

Symptoms of a P0820 fault code may present as:

• Incorrect gear selection or inability to shift gears.
• Transmission slipping or erratic behavior.
• Warning lights on the dashboard, specifically the check engine light.
• Vehicle may enter limp mode, restricting power to protect the engine and transmission.

What causes the P0820 code?

Common causes of the P0820 code include:

• Faulty or damaged gear lever position sensor.
• Wiring issues such as shorts, open circuits, or corrosion in the connectors.
• Poor electrical connections that can lead to intermittent signals.
• Malfunctioning or faulty Transmission Control Module (TCM) that misreads the sensor inputs.

How to fix P0820?

To resolve the P0820 fault code, consider the following steps:

• Inspect the gear lever position sensor for physical damage or wear and replace it if necessary.
• Check the wiring and connectors related to the gear lever position sensor for any signs of wear, corrosion, or disconnection.
• Ensure all electrical connections are secure and clean.
• If the sensor and wiring are in good condition, a thorough diagnostic check of the TCM may be required to determine if it's solely responsible for the fault.