Ok Help Again P0320 Code

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Mindy - 26 Jul 2009 19:16 GMT

cleaned the throttle body real well ... took it out for a ride and boom,
again it died and hard starting .. so while I sat there I did the code
check which I had failed to do earlier and it read P0320
No Crank Reference Signal at PCM
No reference signal (crankshaft position sensor) detected during engine
cranking.

is this the CPS or CKS sensor ... is this located by the oil stick ?? part
number ending in 1020 ??

thanks again to so many helps .. sorry if I cause a flurry in cross posting
.. you all have been generous with your knowledge

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PeterD - 26 Jul 2009 23:16 GMT

>cleaned the throttle body real well ... took it out for a ride and boom,
>again it died and hard starting .. so while I sat there I did the code
[quoted text clipped - 8 lines]
>thanks again to so many helps .. sorry if I cause a flurry in cross posting
>.. you all have been generous with your knowledge

Which engine does it have?

As I mentioned in another thread (and I think several others too)
check the connector first. Make sure the pins are 'squeaky clean'
(clean with contact cleaner, be careful some brake cleaner will damage
the pastic used in connectors) and when reassembling use silicone
terminal grease on the rubber seal (don't let the silicone grease get
on the pins, it's meant to keep water out of the connector by sealing
the shell halves.)

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Mike Romain - 27 Jul 2009 17:01 GMT

> cleaned the throttle body real well ... took it out for a ride and boom,
> again it died and hard starting .. so while I sat there I did the code
[quoted text clipped - 8 lines]
> thanks again to so many helps .. sorry if I cause a flurry in cross posting
> .. you all have been generous with your knowledge

Usually it is the connection on the part. A spray electronic contact
cleaner can do them wonders and not cost a lot. All the sensor plugs
and sockets can benefit from this spray cleaner, they only pass computer
signals and can be dirty without looking so.

As mentioned, yours does have two things called a CPS and on some the
connector is above the oil stick, one others the connection is over near
the throttle body. The 'other' CPS is in the distributor.

I personally just go after any connection I can see with the cleaner
every couple years. That kept my 'dead' TPS running for another ten
years before I got rid of that Jeep....

I would do the clean first.

Mike
2000 Cherokee Sport
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00
'New' frame and everything else in '09. Some Canadian Bush Trip and
Build Photos: http://mikeromainjeeptrips.shutterfly.com

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