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U0206 — Lost Communication Folding Top Control Module

Generic OBD-II · all makesNetwork / communication

The code indicates the vehicle's network can no longer communicate with the module that controls the folding top mechanism.

Symptoms

What causes it — most likely first

1. Corroded or loose connector at the folding top control module

Oxidation or improper seating can interrupt the high‑speed CAN bus signal, causing loss of communication.

2. Damaged wiring harness between the module and other nodes

Chafed, cut, or shorted wires interrupt the data link and trigger the code.

3. Blown fuse or failed power supply to the module

The module requires a stable 12‑V source; a blown fuse or voltage drop disables communication.

4. Faulty folding top control module itself

Internal failure of the module can prevent it from transmitting messages on the network.

5. Malfunctioning body control module or central gateway

If the module that routes CAN messages is defective, it may block communication with the top module.

6. PCM or vehicle network control module failure

A failure of the Powertrain Control Module or network controller can cause widespread communication loss, but this is rare.

How it's diagnosed

  1. Retrieve all stored DTCs and freeze frame data to confirm U0206 is present.
  2. Visually inspect the wiring harness and connectors for the folding top control module for corrosion, damage, or loose pins.
  3. Check the relevant fuse and test voltage at the module's power supply.
  4. Use a scan tool to monitor live data on the CAN bus for activity from the top module.
  5. Perform a continuity test on the CAN‑high and CAN‑low wires between the module and the network.
  6. If all wiring and power are verified, replace the folding top control module as the next step.

Code facts & related codes

SystemNetwork / communication
StandardizationSAE generic — identical on every make
Related codesU0200 — Lost Communication Door Control ModuleU0201 — Lost Communication Door Control ModuleU0202 — Lost Communication Door Control ModuleU0203 — Lost Communication Door Control ModuleU0204 — Lost Communication Door Control ModuleU0205 — Lost Communication Door Control Module

Frequently asked

Can I fix the problem by replacing the PCM?

Replacing the Powertrain Control Module is seldom necessary; the issue is usually due to wiring, connectors, or the folding top module itself.

Will a blown fuse cause this code?

Yes, a blown fuse that supplies power to the folding top control module can interrupt communication and must be repaired before further diagnosis.

Is the code triggered by a software glitch?

The code is generated by a hardware communication failure; software updates do not resolve lost‑communication faults unless a known PCM bug is documented.

How long does the repair typically take?

Repair time depends on the cause; wiring inspection and connector cleaning can be completed in under an hour, while module replacement may take longer.