hi everyone im new and just bought my first civic and need some help i have a 96 ex coupe with d16y8 vtech and it has few bolt ons like header cold air intake and exhaust when i bought it the up strean o2 sensor was missing so i bought one put it in and reset the computer and check engine light went out 40 miles later came back on now i have a p1336 csf sensor intermitten but no p1337 so i have signal im guesing? do i need to just replace the csf sensor? if yes do i have to remove the timing componets? thanks in advance for any help!

 

It's the CKF sensor behind the crankshaft pulley. But first check the connector and wires near the alternator.