Question about 2002 Ford F250 Super Duty SuperCab

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Truck wont start 97 ford 7.3 code PO603 - 2002 Ford F250 Super Duty SuperCab

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Starter was compromised and power to the solenoid was either shunted or under powered.

Posted on Apr 15, 2014

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Posted on Jan 02, 2017

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bschilz
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SOURCE: f350 7.3 code po603 need to know how bad or way

P0603 Internal Control Module Keep Alive Memory (KAM) Error

Ford dealer Tech said to check for corrosion on the battery terminals, if
they’re good the check each battery individually to see if all cells are good.
If that still doesn’t solve it, he says to start pin testing the computer ????!!!??

P0603 doesn’t always mean you have a problem, if you are running any kind
of chip, programmer ,etc. you will get that code.

Posted on Jan 07, 2010

emissionwiz
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You have a failed battery I'm sure

Posted on Jun 01, 2012

  • 458 Answers

SOURCE: 97 f250 ford truck wont start unless you short across the solenoid

A test light is better for basic testing(puts a load on the circuit).You should be able to get a light on the small solenoid wire when the key is turned to "start".If the light comes on,and shorting across the large terminals cranks the starter,the solenoid is the problem.(pretty common cause).

Posted on Aug 09, 2012

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2002 7.3 SUPER DUTY ENGING CODE PO603 WHAT DOES IT MEAN


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1 Answer

F350 7.3 code po603 need to know how bad or way


P0603 Internal Control Module Keep Alive Memory (KAM) Error

Ford dealer Tech said to check for corrosion on the battery terminals, if
they’re good the check each battery individually to see if all cells are good.
If that still doesn’t solve it, he says to start pin testing the computer ????!!!??

P0603 doesn’t always mean you have a problem, if you are running any kind
of chip, programmer ,etc. you will get that code.

Jan 07, 2010 | 2001 Ford F350 Super Duty SuperCab

1 Answer

What do i do with a po603 code. i know whwt it means but now what?


If the Keep Alive Power (KAPWR) has been interrupted by a dead or disconnected battery, code P0603 may set on the first power-up. If this is the case, simply erase the code and see if it comes back.

If this is not the case, then the circuit between the battery and the KPWR terminal on the PCM must be inspected for an open. This circuit is hot all the times even with everything shut off.

If you need more specific info like fuse location, wire color, terminal number, etc. I would need to know what engine you have.

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