How to fix code U0155 for 06 Ford f350

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.

SOURCE: 1999 ford windstar has a p01309 code. what's the

The code means that there's too much variance in the speed of the firing of the cylinders and therefore the misfire monitor is disabled, in a nut shell the pcm is saying the car is running too rough to pinpoint exactly which cylinder is misfiring.

This can be caused by problems with

cam sensor or circuit
CPS = crank position sensor or circuit
MAF sensor or circuit
CTS = coolant temp sensor or circuit
PCM

My question is how is the car running? If it is running smoothly I would check synch of the cam sensor (requires special tool) and or replace it.

SOURCE: 99 Ford F350 Powerstroke diesel; misfire code; loss of power

The first thing i would check is the Glow Plug Relay. Depending on your engine there should be (2 solenoids, or just one) sitting on the top front a little to the right of center. (right bank of engine that is) If you have 2 of them one should be smaller and it is the one furthest to the rear of the engine. It controls power to your glow plugs for cold start up. When you turn the key to the on position the 2 larger wires should both have power. When the ignition is off only one wire should have power. Check this if you do both these tests and only one wire has power with key on or off then you need to make sure that the key switch is sending power to the solenoid. Do this by checking the smaller wire with key off. It should not have power and then with key on it should have power. If this is good and test one is bad then the relay is bad. Note This is not true for the larger realy that sits furthest foward on the engine. The bigger one. This test will not work for it but it controls your intake heater. On another note: This is a timed circut and will "kick out" after about 1-2 minutes. In otherwords it does not stay on all the time that key switch is on it will for for about 1-2 minutes then shut off! Next would be your injectors are getting weak or bad and even your HPOP could be getting weak. or glow plugs in engine are out, In otherwords there are alot of possibilities causing your problems If you are getting a misfire code for your injectors then you may have some weak or inop injectors. Any way this will give you a pretty easy test for the most common failure which is the Glow plug relay. About 35-40 bucks at your local auto parts house.

SOURCE: i have a 2003 ford f350 with a code p1331 what

I ran this code through Google and it came up as a code for diesels. Is your truck a diesel?

Here is a website that should help you out. Please let me know if you need any further questions.

carsandcomps,

Guru, Premium Expert @ Fixya.com

http://www.thedieselstop.com/forums/f23/p1331-144660/

SOURCE: I had my 2004 Mazda

Codes that begin with the letter U are always communication fault codes between modules in a CAN system. They are basically to be ignored unless a problem is occuring. This is because all of the control modules in your car ( and there are a bunch of them ) are all communicating to each other and sending information between each other on one set of wires called a "twisted pair" Due to the high volume of infomation being sent and received there is the invevitable time when a message will be sent from one module to another and it is lost or not responded to in a timely manner (meaning in milliseconds) When this occurs then a U0100 or other comm fault code is stored.