P0802 Fault Code

Transmission Control System MIL Request Circuit / Open

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

The P0802 code indicates an issue with the transmission control system. Specifically, it signals that the MIL (Malfunction Indicator Lamp) request circuit is open or has been disrupted. This can affect the vehicle's ability to manage and monitor the transmission's performance, leading to potential drivability issues.

What are the symptoms of the P0802 code?

Symptoms associated with the P0802 code may involve:

• The check engine light illuminated on the dashboard.
• Poor shifting performance or erratic transmission behavior.
• Unresponsive transmission in certain driving conditions.
• Reduced fuel efficiency due to transmission issues.
• Transmission not engaging or slipping.

What causes the P0802 code?

Common causes of the P0802 code include:

• Damaged wiring or connectors in the transmission control circuit.
• A malfunctioning Transmission Control Module (TCM).
• Faulty input/output sensors related to transmission management.
• Issues with the transmission fluid level or quality.
• Corroded or loose electrical connections.

How to fix P0802?

To resolve the P0802 code, consider the following steps:

• Inspect the transmission control circuit for damaged wires or connectors and repair as necessary.
• Test and replace the TCM if it is found to be malfunctioning.
• Check and replace faulty sensors related to the transmission system.
• Ensure that the transmission fluid is at the correct level and is clean; replace if necessary.
• Clear the code and conduct a road test to ensure the problem is resolved.