DPF Fuel Injector1 No Response msg on dash

[dbl overdrive]

The injector no response message could be a broken or burnt wire harness on the dosing injector itself so i would inspect that wire , they are notourious for breaking right at the base of the doser or burning off near the plug that run to the main harness next to the exhaust manifold. Also, if you have smoke in that general area, I would inspect the doser itself for cracks. I have seen them get to hot and crack. It could be a fire hazard if it's leaking.
Not sure when it was changed but the new style doser requires updated lines to be properly installed.
If you suspect any other leaks, wait untill the engine is cool and spray it down with soapy water and most of the time you find any air leaks.