2001 GMC Jimmy pO300 code

2001 GMC JIMMY
86,000 MILES • 6 CYL • 4WD • AUTOMATIC
Avatar
EVOLUTION46
  • MEMBER
  • 3 POSTS
i have replace the motor in my jimmy .
i keep getting the po300 code i change every thing
plugs,cap ,rotor,wires,fule fileter,even the motor.
and still get that po300 code every thing runs fine.
what can i do next.be side buy a new car.
Feb 22, 2009 at 9:49 AM
Advertisement
Avatar
DAVE H
  • CERTIFIED EXPERT
  • 13,384 POSTS
check/clean or replace the

Crankshaft Position Sensor
The Crankshaft Position (CKP) sensor utilizes a pick-up coil type sensor mounted on side of engine block or on bottom of timing cover. The CKP sensor monitors crankshaft position and sends signals to ignition control module. These signals provide PCM with a TDC position reference for each piston, as well as supplying an engine speed (RPM) signal. This allows PCM to fire appropriate ignition coil at the proper time, determine triggering of the fuel injectors, and to compute crankshaft position and RPM. CKP sensor signal is also used to detect a cylinder misfire by monitoring changes in crankshaft speed.
Mar 1, 2009 at 8:06 AM