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yeti
Dodge Dakota
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2/05/2007
14:25:04
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 Subject: code P1391
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Message:
this code came up recently,( intermittent loss of the crank or cam position sensor), and the MIL went away by itself after about 3 stop and startup cycles. is it normal for this code to go away by itself ? thankyou for any replies. (2000 dak., 3.9, auto, 42,000km.,& severe cold and wind when it occured)
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?
Dodge Dakota
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2/05/2007
15:15:03
| RE: code P1391
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Message:
It should 'go away by itself' when the
problem no longer exists.
However it will probably still remain in memory
"until reset" , as a stored previous code.
The [ cold ] is what triggered it.
Most 'electronics' can only function down to
certain temperatures.. Fortunately , at least it was able to recover and keep you running..
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Fasstdak
Dodge Dakota
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2/06/2007
20:21:32
| RE: code P1391
IP: Logged
Message:
It doesn't go away - it turns into a "stored code" and it IS kept in the PCM for future reference. It requires 2-3 good trips to clear (depending on the problem).
I'd be looking at the crank sensor - check the body for cracks...they're notorious for this (hot or cold weather).
As for the temperature, the dodge systems are more than capable of running in -20F weather without issues. The PCM has formulas built in that cover a huge temperature range to keep things running properly.
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