2006 jeep liberty timing chain

[fixkick]

Also would like to know if a fuel pump is going bad will I get a code for that?

hello Victoria. (the V6?engine?)
no codes told P0xxx or P1xxx  or P2xxx DTC codes. , need exact codes to be smart here.
the timing chain must not be bad, or this smarter ECU (PCM) will in fact send out (seems false but not) crank and cam sensor errors.
all it knows is the 2 do not agree!!!, and is a loose chain.  (also reports as the to are not Congruent "differ")

fuel pump bad, may send a code, even if not direct code you will get
1: hard starts.
2: engine stalls
3: engine lacks power.
4: lean codes for P017x code for fuel mix wrong.

the chain on all older engines near 200k miles may be bad. (loose) and the guides.
with that new head was  chain job done, I bet not.  it is a hard job this, for sure no oil leaks after, hard to crack a Brazil nut job.