P0802 – BMW DTC

BMW DTC P0802 – Transmission Control System MIL Request Circuit/Open

DTC P0802 meaning on BMW

DTC P0802 in a BMW refers to the Transmission Control System MIL Request Circuit/Open. This diagnostic trouble code indicates that there is an issue with the circuit that controls the Malfunction Indicator Lamp (MIL) in the transmission control system.

BMW DTC P0802 symptoms

Symptoms of DTC P0802 in a BMW may include:

• Check Engine Light (MIL) illuminated on the dashboard
• Transmission shifting issues
• Reduced fuel efficiency

BMW DTC P0802 causes

Common causes of DTC P0802 in a BMW include:

• Faulty transmission control module
• Wiring or connector issues in the transmission control circuit
• Defective transmission control relay

BMW DTC P0802 seriousness

DTC P0802 should be addressed promptly as it can lead to transmission performance issues and potentially affect the overall drivability of the vehicle. Ignoring this code may result in further damage to the transmission system.

How to diagnose DTC P0802 on BMW

To diagnose DTC P0802 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer.
2. Inspect the transmission control module for any visible damage or signs of corrosion.
3. Check the wiring and connectors in the transmission control circuit for any breaks or loose connections.
4. Test the transmission control relay for proper functionality.

How to fix DTC P0802 on BMW

To fix DTC P0802 on a BMW, you may need to:

1. Replace the faulty transmission control module if necessary.
2. Repair or replace any damaged wiring or connectors in the transmission control circuit.
3. Replace the transmission control relay if it is found to be defective.

How to erase DTC P0802 on BMW

To erase DTC P0802 on a BMW, you can:

1. Use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer.
2. After making the necessary repairs, drive the vehicle to see if the code returns.
3. If the issue has been resolved, the MIL should turn off on its own after a few successful drive cycles.

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

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