• Tiny
  • bluekali
  • 1995 Buick Lesabre

Electrical problem
1995 Buick Lesabre 6 cyl Two Wheel Drive Automatic

how do you check acrank shaft sensor

Friday, June 26th, 2009 AT 6:04 PM

1 Answer

  • Tiny
  • bluelightnin6
  • Expert
  • 17,063 posts

Get an OBD II scan tool that will show live data. Pull up the RPM reading and crank the engine over. Hold accelerator to floor to shut off fuel to the engine. No reading find the crank sensor, inspect for damage, unplug electrical connector and clean it with electrcial contact cleaner spray and then plug the connector back into the sensor. Crank the engine while watching for RPM reading, again hold down the accelerator to prevent fuel flow to the engine. If you have RPM reading now sensor is ok, engine should run. I have seen to many Sables with just dirty connections at the crank sensor. The sensor by nature is very durable and should not fail. If you still do not see RPM you may have a internally damaged sensor or wiring problem.

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Friday, June 26th, 2009 AT 6:06 PM

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