Originally Posted by moogotzskillz2

sup yeall. i know its be dissuced SO many times, but i have a startin problem, i know what it is, i changed the Starter to 10 tooth nissan one, and it HELPD alot. but i still have check engine light, and i check it its the CRANK REF one.? does that have an effect.

-moo

Originally Posted by ECU Sticky

Diagnostic Trouble Code 0407 indicates a malfunction was detected when...
A) 120 degree signal is not entered to ECM for the first few seconds during
engine cranking.
B) 120 degree signal is not entered to ECM during engine running.
C) 120 degree signal cycle excessively changes during engine running.

Possible causes...
- Harness or connectors
- Crankshaft Position Sensor (REF)
- Starter motor
- Starting system circuit

Perhaps a marginal starter would crank the engine at a non-uniform rate (fast-slow-fast-slow) and disrupt the normal rhythm of pulses from the CPS. This is consistent with the starter motor problems you have recently reported.

Originally Posted by bobjohnson

BUMP>> I CANNOT find this CPS (ref) sensor anywhere.....can someone help me.

ALSO>> when purchasing this on rockauto.com which CPS (ref) sensor do i get? there are a few (ref) sensors to choose from... im kinda lost.