A blown fuse or poor connection in the power or ground circuit to the moveable roof control module.; Corroded, damaged, or disconnected wiring at the roof module connector, often due to water intrusion or flexing.; A faulty moveable roof control module itself, though this is less common than wiring issues.; CAN bus wiring damage (open, short, or high resistance) between the roof module and the rest of the network.; Low battery voltage or a weak charging system causing modules to drop offline intermittently.; A poor ground connection at the roof module mounting point or chassis ground stud.

DTC codes / U02xx · Lost communication with a control module / U0207

U0207Lost Communication With Moveable Roof Control Module

Q: What does code U0207 mean?

Lost Communication With Moveable Roof Control Module. U0207 is a network communication fault indicating that the module responsible for the moveable roof (sunroof, convertible top, or panoramic roof) has stopped reporting on the vehicle's Controller Area Network (CAN) bus. The computer that sets this code has detected a loss of the periodic messages it expects from the roof control module, which can be caused by a power, ground, or bus wiring issue rather than a failed module.

U0207 is a network communication fault indicating that the module responsible for the moveable roof (sunroof, convertible top, or panoramic roof) has stopped reporting on the vehicle's Controller Area Network (CAN) bus. The computer that sets this code has detected a loss of the periodic messages it expects from the roof control module, which can be caused by a power, ground, or bus wiring issue rather than a failed module.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaLost communication with a control module

Symptoms you may notice

The moveable roof may not open, close, or stop in the correct position.
A warning light or message on the dashboard indicating a roof system fault.
The roof may operate intermittently or only after several attempts.
Other unrelated electrical features may act erratically if the fault is on a shared bus.
Often no symptoms besides the warning light, especially if the roof was not recently used.

Common causes, most likely first

A blown fuse or poor connection in the power or ground circuit to the moveable roof control module.
Corroded, damaged, or disconnected wiring at the roof module connector, often due to water intrusion or flexing.
A faulty moveable roof control module itself, though this is less common than wiring issues.
CAN bus wiring damage (open, short, or high resistance) between the roof module and the rest of the network.
Low battery voltage or a weak charging system causing modules to drop offline intermittently.
A poor ground connection at the roof module mounting point or chassis ground stud.

How to diagnose and fix it

Verify battery voltage and charging system output; a weak battery can cause communication codes.
Check all fuses and relays that supply power to the moveable roof control module, including any in the trunk or underhood fuse boxes.
Inspect the roof module connector and wiring for corrosion, water damage, or loose pins; clean and reseat as needed.
Perform a voltage drop test on the power and ground circuits at the roof module connector to confirm they can carry current.
Use a scan tool to check for communication with the roof module; if it does not respond, proceed to bus wiring tests.
Measure CAN bus resistance and voltage at the roof module connector to detect an open or short in the network wiring.
If all power, ground, and bus tests pass, substitute a known-good module or perform a relearn/configuration procedure as required.

Common misdiagnosis traps for U0207

A dead battery or recent jump-start can set U0207 as a history code that clears after a few drive cycles, so always check for stored history codes before replacing parts.
Water leaks into the trunk or roof area often corrode the module connector and cause this code, so inspect for moisture trails and stains even if the connector looks clean.
The moveable roof control module may share a bus segment with other body modules; a fault in one module can take down the whole segment and set multiple U-codes, so diagnose the network as a whole.
Aftermarket accessories tapped into the roof circuit, such as dash cams or alarm systems, can introduce noise or voltage drops that mimic a failed module.
A module that fails to communicate may still be functional; always verify power, ground, and bus integrity before condemning the module itself.

Can I keep driving with U0207?

You can generally drive the vehicle with this code, but avoid using the moveable roof until the fault is repaired, as it may stop mid-operation or fail to latch securely. If the roof is stuck open or not fully closed, do not drive at highway speeds or in rain until it is secured.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.