2006 Opel Vectra with code P0090, U2105 and U2139 what needs changing?

Question

2006 Opel Vectra with code P0090, at around 1800rpm I have a slight misfire more noticeable in the 4th 5th 6th when I'm cruising but it cant always be felt when I am accelerating

Answer 1

I would start by checking the fuel pressure, you could have a problem with the fuel pump.

P0090 Code - Fuel Pressure Regulator 1 Control Circuit
Read more: https://www.autocodes.com/p0090.html

U2105 Code - Lost Communications with Engine Control Module
Read more: https://www.autocodes.com/u2105.html

U2139 Code - Lost Communication with Column Integration Module
Read more: https://www.autocodes.com/u2139.html