REPLACED THE CKP ON THE ENGINE AND STILL HAVE THE CODE AND CAR WILL NOT START

  • Tiny
  • 06ls2gto
  • 2006 Pontiac GTO
  • 76,000 miles

Will a missing ground wire for the engine throw the code?

Is there a ground wire for the sensor cables?

Wednesday, December 21st, 2011 AT 3:43 AM

1 Answer

  • Tiny
  • caradiodoc
  • Expert
  • 24,902 posts

Fault codes never say to replace parts. They only direct you to the circuit or system that needs further diagnosis. Most crank sensors have a 5.0, 8.0, or 10.0 volt feed wire, a ground return wire, and a signal wire. The feed and ground wires can be common to multiple sensors. Some crank sensors use only two wires. They still work magnetically but a pulse of voltage is induced directly into a coil of wire and there is no other circuitry to amplify the signal like there is in the three-wire sensors.

While it's true you will indeed find a defective sensor at least 50 percent of the time, you are just as likely to find a corroded splice, cut wire, or stretched or corroded terminal in a connector.

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Wednesday, December 21st, 2011 AT 4:03 AM

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