hello everybody
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Registered User
Joined: Mar 2012
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From: mexico
hello everybody
hello there, This is my firs post I need some help I own a ram 02 4.7 4dr 133,000 kilometers Im having some bucking sensation while driving replaced spark plugs with champion NO cel light went to autozone and nothing came out I turned the key on and off 3 times and odometer showed P1391, could somebody tell me which sensor is bad? cam or crank sensor? Why the check light is not on and code scanner is not showing nothing?
thanks..
thanks..
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Joined: Feb 2010
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From: Houston, TX
Welcome to the site!
Well I checked that code and it tells me the same thing, either the cam or the crank sensor. It's kind of funny that they can have so many different codes yet they don't have a code to say which particular sensor it is. I had the same code a while back and switched both sensors - when they went bad it made my truck impossible to start sometimes, it would crank and crank just fine, just never fire.
I think that the computer has to detect the fault 20 or so times in a row before it will light up the check engine light. I think it's something like a pending or stored code before it becomes an active code.
Well I checked that code and it tells me the same thing, either the cam or the crank sensor. It's kind of funny that they can have so many different codes yet they don't have a code to say which particular sensor it is. I had the same code a while back and switched both sensors - when they went bad it made my truck impossible to start sometimes, it would crank and crank just fine, just never fire.
I think that the computer has to detect the fault 20 or so times in a row before it will light up the check engine light. I think it's something like a pending or stored code before it becomes an active code.
Thread Starter
|
Registered User
Joined: Mar 2012
Posts: 4
Likes: 0
From: mexico
Welcome to the site!
Well I checked that code and it tells me the same thing, either the cam or the crank sensor. It's kind of funny that they can have so many different codes yet they don't have a code to say which particular sensor it is. I had the same code a while back and switched both sensors - when they went bad it made my truck impossible to start sometimes, it would crank and crank just fine, just never fire.
I think that the computer has to detect the fault 20 or so times in a row before it will light up the check engine light. I think it's something like a pending or stored code before it becomes an active code.
Well I checked that code and it tells me the same thing, either the cam or the crank sensor. It's kind of funny that they can have so many different codes yet they don't have a code to say which particular sensor it is. I had the same code a while back and switched both sensors - when they went bad it made my truck impossible to start sometimes, it would crank and crank just fine, just never fire.
I think that the computer has to detect the fault 20 or so times in a row before it will light up the check engine light. I think it's something like a pending or stored code before it becomes an active code.
