D flash is in the operators guide, it says, bad tranny.
lost the guide? ive posted it 100 times now. the link, need it?
obd2 is easy P0xx codes are USA FED, spec codes ( a standard)
google is really your friend, 1st hit , bingo,
overwhelmed, ? yes, A/Ts are on the extreme complex side.
ask any ASE badged mechanic, for help.
the dealer will be (stealerships) like $6000 fix, 1/2 tranny and 1/2labor.
if tranny slips dont drive it, or the costs to fix rise fast.
as you can see, it can be
1: bad wires.
2: bad sensor.
3: bad transmission.
only testing finds the cause, and wire inspections and maybe new sensor and pray.
what skinflints do (or just smart)
is reset it (OBD2 scan tool reset) and see if it comes back , praying its a 1 time ever error. this decade.
see>? this is true with all DTC'S, reset and pray.
or in the case of 455s tighten the gas cap,reset and pray.
DTCS are errors. (onboard, diagnostic monitor errors)