CM871 poor power and fuel econ

[Rawze]

(04-10-2022 )Grounded Pilot Wrote:  ... Or any other ECM reasons that it would be throwing that code??

if the program does not match the engine ser# and/or that model make truck it can over-sensitive and throw TSP faults too.

Make sure the program in the ecm matches the truck/engine.

re-read my very first reply to this thread ...

(02-16-2022 )Rawze Wrote:  DEMANDATE PROGRAMMING...
first and foremost, assume the delete program is bad. Pull a copy of the program out of the engine and e-mail it to me for a proper review.

ref: http://rawze.com/forums/showthread.php?t...0#pid70220

You need to ensure the program in the ecm is correct and safe for that engine/truck and that the demandate was done properly.