TSB for P1604 with no CEL; Startability Malfunction/Timing Chain Cover replacement
 

Can anyone post the TSB for P1604?
There is a built issue with the timing chain cover involved.
In some some cases the cover must be replaced.
There is no CEL lightning up, so many dealers will erase or ignore that error
unless the car is undriveable.

I will need your last 8 digits of your VIN number. I can look it up on our website.