Question 1

What does fault code U0155 mean?

Accepted Answer

U0155 means the vehicle's main ECU or another control module has lost communication with the instrument cluster over the CAN bus network. The cluster has effectively disappeared from the car's internal data highway, causing a dead or erratic dashboard.

Question 2

Is it safe to drive with a U0155 fault code?

Accepted Answer

Driving with U0155 is not recommended. A dead or erratic dashboard means you lose speed, fuel, temperature and warning light information. You will not know if your engine is overheating or running low on oil pressure. Get it diagnosed before driving further.

Question 3

How much does diagnosing U0155 cost at MnF Motors in Ilford?

Accepted Answer

Electrical fault diagnosis at MnF Motors starts from £60. After pinpointing the exact cause — whether it's a wiring fault, bad earth, power supply issue or the cluster itself — we give you a fixed repair quote before any work starts.

Question 4

Can a bad earth cause U0155?

Accepted Answer

Yes. A corroded or loose earth strap is one of the most common causes of U0155. Without a solid earth reference, the cluster's internal circuits behave unpredictably and drop off the CAN bus. This is precisely why proper diagnosis beats guessing with parts.

Question 5

How far from Ilford is MnF Motors?

Accepted Answer

MnF Motors is located at Unit 13 Shaftesbury Road, Edmonton N18 1SW — typically 20 to 35 minutes from Ilford via the North Circular or A406, depending on traffic. We serve Ilford and all areas within 20 miles of Edmonton N18.