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I used my Hypertech Power Programmer III (part no.1034) to scan my truck's computer for any trouble codes. It returned a 'PFFFF' for a code. I know the 'P' is the first letter of the code but what does the 'FFFF' stand for? It says to refer to the manual but trouble codes only have 4 digit numbers, no letters after the 'P'. Does anyone have any ideas? Anyone had this happen before? BTW this truck has been having a miss throughout the throttle range, especially when accelerating. Some days it does not happen at all. I have went over everything very well as well as replaced the spark plugs and boots. I have a '99 250 with a V10 wimp. Thanks guys.
I am a ford tech and the only time I have seen the pffff is when a customer has a programer installed. The p stand for pcm (power train control module) the ffff has something to do with the programer confusing the pcm. remove the program, drive the truck untill the check engin light comes on (should come on with missfire) and then check for codes, having a v-10 you probably have a bad coil, this is very comon on all of fords moduler motors, the problem is that you need a good code to know what cylinder it is. Hope this will help.
Ok, Rob could you check my last couple of posts and tell me what you think about my missfire codes on my 02 f-250 v-10. Can an 02 sensor cause a missfire code p0316, p0306, p0307, p0174. All new plugs new coils on #6#8 the code for #8 cleared but the rest keep coming back? Thanks Sean
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