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U0106: The glow plug control unit is not answering on the car network

The glow plug control unit is not answering on the car network. It is usually that control unit, its power supply or the network wiring.

Code U0106 at a glance
CodeU0106
SystemCommunication network
GroupU01xx, Lost communication with control units
TypeGeneric: it means the same on every make

How to read and clear U0106 with Final OBD

Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see U0106 with its description and whether it’s confirmed, pending or permanent.

If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.

Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.

Similar codes

What does code U0106 mean?

The glow plug control unit is not answering on the car network. It is usually that control unit, its power supply or the network wiring.

How do you clear U0106?

With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, U0106 comes back.