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Jake, Nissan Technician
Category: Nissan
Satisfied Customers: 4281
Experience:  Experienced collision repair technician, Pulaski Tech graduate and DSM hobbyist.
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my engine warning light is on, and the performance is bad top

Customer Question

my engine warning light is on, and the performance is bad top speed of 40mph, i have been told by a nissan garage that they need to remove the dashboard to sort it out and it will cost FROM £600-help!!!
Submitted: 3 years ago.
Category: Nissan
Expert:  Jake replied 3 years ago.

Hi there, with any U1000 and U1001 code you will need to perform CAN diagnostics.


A nissan dealer can easily perform CAN diagnostics to see the control unit not communicating. Since you actually have driveability issues and not just a U1000 code then you may have an actual failed control unit instead of a grounding issue.


I assume the dealer was referring to tracing the CAN lines and inspecting for damage which is highly unlikely.


You need to clean and inspect the ECM grounds at the dash beam and also by the battery. If cleaning and retightening grounds does not resolve the code then CAN diagnostics will have to be performed at the dealer.


Sometimes if you have a regular scanner that cannot run CAN diagnostics you can unplug the control units one at a time.