P1531 and Cylinder Contribution Test, etc.
Hey, new to this site but not the PSD
. Haven't had to work on mine in many years but having some running issues lately. When trying to run a cylinder contribution test with AE
software I get a P1531 code: Invalid Test: Accelerator Pedal Movement. If I unplug the TPS
it will complete a test most of the time (with inconsistent results). Is the P1531 normal and you're supposed to unplug the TPS
, or do I have a bad sensor? Don't think that would be the cause of my problems but want to know why I'm getting that code.
1997 F-250 HD 4x4/OR SC LB XLT PSD E4OD 3.55LS, TDE1, Baby Swamps (150/146/A), BTS Trans, BTS programming, Autometer Pyro, Trans Temp and Boost in Rockin' S Pod, Tymar style intake, 6.0 Intercooler, Tru-Cool Max tranny cooler, Warn Premium Hubs, Shimmed FPR, Gutted EBPV, Super Duty 3" DP, 4" Exhaust