My advice its to switch the injectors from #1 to #6 and see if the #6 its misfiring.
Also check the resistance on all of them.
The problem can be as easy as a faulty injector/s!
(could be that couple of them are faulty)
P0201 Injector Circuit Malfunction - Cylinder 1, does not respond properly to control signal
Specific P0201 its just cyl. Number one!
Let us know on your findings!
Thursday, January 10th, 2008 AT 7:45 PM