UK Car Repair Questions? Ask a Mechanic for Answers ASAP
Hi. Please have your mechanic check the egr cooler. They can plug up and cause lack of egr flow and set p0404. Is this something he will do for you?
What I mean by plugging up is that the exhaust gasses that run through the EGR cooler can collect soot on the fins of the cooler and actually restrict the egr flow. Setting p0404. Unfortunately I do not have the diagrams for the X-Trail. Also if there was an electrical problem with a valve or the wiring a circuit code would be being set in the computer.
Your welcome. Thank you and please rate my service and let me know what your mechanic says. Thank you.