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Old 03-06-2014, 03:01 PM   #1
93pb
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2002 3.5 crankshaft position sensor

I have to change my crank sensor will I need a special scan tool to reset after install? Or can I install clear the code and be good?

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Old 03-06-2014, 03:05 PM   #2
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Re: 2002 3.5 crankshaft position sensor

If you don't do the crank variation relearn procedure, the code will usually set.....to do that you need a GM scan tool....
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Old 03-06-2014, 03:32 PM   #3
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Re: 2002 3.5 crankshaft position sensor

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Originally Posted by Tech II View Post
If you don't do the crank variation relearn procedure, the code will usually set.....to do that you need a GM scan tool....
I am sorry does that mean I have to have a dealer reset the code or will it reset on its own?

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Old 03-06-2014, 08:51 PM   #4
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Re: 2002 3.5 crankshaft position sensor

Well, the code(P1336) will set if the relearn is not done......I don't know If other scan tools have the same ability as the GM Tech II scan tool, to do the relearn......

You can install the crank sensor....run the car....if the code comes....clear it......if it comes back again, then you need the relearn procedure....might check local garages to see if their scan tool can do this.......

Supposedly, if the relearn procedure is not done, it's "possible" you could exhibit hesitation, or set false misfire codes......
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Old 03-07-2014, 05:13 AM   #5
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Re: 2002 3.5 crankshaft position sensor

thanks for the help, do you moonlight I live in warren ma. area and have heat garage.
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Old 03-07-2014, 08:46 AM   #6
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Re: 2002 3.5 crankshaft position sensor

As Tech II stated, a relearn IS required after the sensor is replaced. It requires specific conditions be met (coolant temp above 158) then prompts are issued by the Tech2 scanner to properly complete the process.
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Old 04-05-2014, 05:12 PM   #7
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Re: 2002 3.5 crankshaft position sensor

Just a follow up, I changed out the sensor (easy) It was harder pulling the starter for access. Took about 20 minutes from start to finish.

Car started right up and did not have the relearn process done. Been running fine now for weeks.
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Old 04-05-2014, 06:23 PM   #8
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Re: 2002 3.5 crankshaft position sensor

Surprised it didn't set the crank code or a misfire code.....
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Old 04-06-2014, 05:51 PM   #9
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Re: 2002 3.5 crankshaft position sensor

Ya I only had the sensor A code and it registered twice, sometimes it pays to be lucky.
Car is running great.
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