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Hello,
I have a 2000 Grand Prix GT non-supercharged with the 3.8L Series II. I have been getting off and on for about 2 year a “P0336 Crank Shaft Position Sensor A Circuit Range/Performance” code. I delete the code and it comes back again about a month or two later. I also at random will be driving on the highway and the Tachometer stops working and drops to zero and the “Trac-off” light comes on and sometimes accompanied by the check engine light. The car runs fine when this happens. Sometimes the car will stall if the P0336 code comes on at like a red light. Is it safe to say I need to replace the crank shaft position sensor? I know its behind the harmonic balancer. Do I need to take it to GM to have a “Case learn” completed by their scan tool after replacing this sensor? I also want to mention that my over drive spline shaft is worn and I have no over drive. I just haven’t had the money to have the transmission rebuilt so I try not to take ot over 50 mph. Thanks for reading!
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Replies
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Check the wiring right at the connector it may be worn off.
The sensor lives behind the harmonic balancer which is a harsh
environment. Here is some troubleshooting.http://troubleshootmyvehicle.com/gm/3.8L/how-to-test-the-crank-sensor-1
If you replace the crankshaft sensor you should do a crankshaft variation relearn procedure with a scan tool that will perform that task….but I have gotten this info from some fellow GM “gear heads” that this will work, but I’ve never done it
1. Turn off all of the accessories. With the Air temperature sensor and Coolant temperature within 5 degrees (Centigrade) of each other, start the engine and let it idle in Park or Neutral for two minutes.
2. Accelerate the vehicle to 55 mph at part throttle. Cruise at 55 mph for 8- 10 minutes until the engine reaches operating temperature.
3. Cruise at 55 mph for another 5-6 minutes.
4. Decelerate to 45 mph without using the brakes, and maintain 45 mph for 1 minute.
5. Perform 4 deceleration cycles, without using the brakes, of 25 seconds each where no specific speed is necessary. Returning to 45 mph for 15 seconds in between deceleration cycles.
6. Accelerate to 55 mph and cruise for 2 minutes.
7. Stop the vehicle and idle for 2 minutes with the brake applied and the transmission in Drive (automatic trans.) or Neutral (manual trans.) with the clutch depressed.
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