Need help.
My range is currently in limp mode I believe. It’s showing following codes:P0304-00 -Cylinder 4 Misfire
P0305-00 - Cylinder 5 Misfire
Р0300-00 - random misfire
U0155-87 - Lost Communication With Instrument Cluster Control Module
P0579-00 - Speed Control Multi-function Input A - Circuit Range/performance
P0576-16 - Speed Control Input - circuit low
P0056-00 - Heated Oxygen Sensor, Heater Control Circuit (Bank 2, Sensor 2)
P0316-00 - Start-up (First 1000 Revolutions)

Any advice on where to start. I’ve changed the spark plugs. Codes still showing

 

What model RR do you have? You should post your technical questions in the section of the forum that applies to your vehicle. You’ll get more answers there.

 

Hey there!It looks like you’re dealing with multiple issues.The error codes point to possible ignition problems (P0304, P0305, P0300) but also communication issues with the module (U0155-87) and sensors (P0056-00).Start by checking the ignition coil and wires since they might be causing the misfire codes.Sensor codes might be due to a faulty wire or poor ground connection.