Remove the intake manifold and coolant pipe (3bolts), then it’s easy. 20 minute job to get it off. Tried the other way but ended up with bruised and bloody hands.

Anybody else have P0670 code after replacing the glow plug module and plugs? Before I replaced it the error was P0675 (glow plug #5).

I probed the module connector plug with a multimeter and it has power, LIN signal, and continuity to the plugs. The dealer said replace the whole engine wiring loom (it has changed from 1 single loom to a different design with separate cables. My car has the older single harness which costs $600 without labor).