Help P0335 and P0341
 

Help, i have an 01 blazer 4x4 that i have a couple of issues with it. I bought this trk with a number of things wrong with it, and with the help from fellow memebers i've managed to fix all the problems with the exception of these two codes p0335 and p0341, i've replaced both sensors "crank and cam" and checked all the wiring and found nothing..:icon_doh: Has a tune up, cap,rotor,plugs,and wires filters air and gas ..can anyone point me in the right direction as what to do?? i should mention that i had the ignition module tested and it tested fine, i noticed that the tach jumps around and trk has an intermittent miss, it'll run fine one minute and start acting up the next.:icon_shrug: I have a feeling that the ignition module may be bad, but not positive??? any ideas?? Please help!!!!!!!!!!!!:icon_playing:

Have you tested all of the wiring between the CKP/CMP sensors and the PCM? The wiring diagrams can be found in the posted OBD2 codes concerning those sensors.

P0341 - CMP (camshaft position) Sensor A Circuit Range/Performance

Use the diagram from P0336:
P0336 - CKP (crankshaft position) Sensor Circuit A Range/Performance