code P?
well the only thing i can find on that is it means 'Pendant Detected'
but there is no explanation as to what it pertains to
this one is a mystery
odd they would tell you that in the troubleshooting guide but not tell you what causes it or how to troubleshoot it.
maybe someone else here will see this thread that has encountered this error and know what it is and how to fix it

now just making an educated guess being that it describes it as a 'pendant' code i would make the assumption it might pertain to maybe an impact sensor or level sensor but that is just a logical guess.
Knowing these trucks do not normally come equipt with these type devices normally, without any info on it i wouldnt put a whole lot of thought into what i think about it ;o)

sorry i cant help with this one