code p0603 problem
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Freshman User
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code p0603 problem
My 95 ford diesel won't idle at all. I checked it with my code reader. The only code it shows is a p0603. I have cleared it off three times. When I start my truck back up and run it a few minutes. I check it and the same code appears. All my friends says to replace the pcm it's bad. Are they a way to check it.
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Joined: May 2001
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From: Cabot, Arkansas
Welcome to Ford Truck Enthusiasts paulgc.
The KAM error code is very common. Anything that disrupts battery power will set the 603 code. It is not a good indication that your PCM is bad.
Is it just an idle problem? I.e....can you keep it running above idle or will it not start at all?
The KAM error code is very common. Anything that disrupts battery power will set the 603 code. It is not a good indication that your PCM is bad.
Is it just an idle problem? I.e....can you keep it running above idle or will it not start at all?
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cookie 88. The truck will start but won't idle. Sometimes you can keep the rpm up around 3000 and it will smooth out the a minute or two. It don't smoke know more the it would when it was running good. Now the truck won't pull the hill at my house.
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When I check the fuel pump what should the pressure be. My book don't tell what the pressure gauge should say. On a 95 ford diesel 7.3.
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Post Fiend
Joined: Apr 2004
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From: Silver Lake Dunes, MI
fuel pressure should be 40-60 mine after shimming runs 75psi. also do you ahve a chip installed. p0603 (or is it 605) is normal if you have a chip installed
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Post Fiend
Joined: Apr 2004
Posts: 12,835
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From: Silver Lake Dunes, MI
make sure you are checking your alternator output atleast 2 minutes after starting but not before since the computer does not command the alt. to charge a short time after starting. you will see you volt guage jump up once the alt starts charging. some say this is the glow plugs but its no. cause the glowplug are timed via oil and air temp and the alt won't start charging for the same exact time everytime. so in short if youa re checking alt ouput right after starting it won't be correct.
