installed harmonic balancer threw code po336

Question

Ring had come off pulley upon starting car in morning2004

Answer 1

Hi there,

This code points to a faulty crankshaft sensor. It is possible the crankshaft sensor itself is bad. Here are some other possible reasons. 

P0336 BUICK - Crankshaft Position Sensor 'A' Circuit Range/Performance

Read more: https://www.autocodes.com/p0336_buick.html