Diagnostic Trouble Code (DTC) Descriptions . P0123 - Throttle Position (TP) Circuit High Input . The TP sensor circuit is monitored by the PCM for a high TP rotation angle (or voltage) input through the comprehensive component monitor (CCM). If during key ON engine OFF or key ON engine running the TP rotation angle (or voltage) changes above ...I've torn into the engine and found 2 problems so far. 1 there is a gash in the lower Turbo air line going into the intercooler, that appears to have been cause by the fan. 2 The radiator and engine are guck'd up with road grime and oil. The gash in the turbo accounts for the engine being gutless, and the clogged up radiator would make it run hot. Jul 11, 2014 · A class-action lawsuit filed July 10 by three trucking companies against Navistar-International echoes claims of similar lawsuits filed this week: The truck and engine maker knew its EGR-only ... Navistar International Truck and Engine provides state of the art engine and chassis diagnostic software. Servicemaxx and Diamond Logic Builder along with Nexiq Interface cables will deliver the ability to diagnose all International trucks. This is a great product and TPX Power Source offers only quality products at fair prices. international dt466 inner timing cover 1839141c6 ... 1820465c4 frnt cover offin4468 on a core engine possible no good ck cond look need to pull for type and numbers ... Dt466 prime fuel pump IPR Test on bench In this video I go through what I did to test my IPR valve. I believe the valve is bad. How to clear engine Codes - DT466E Trade Secret - quickly erase engine codes for diagnostic purposes. **** PLEASE SEE MY OTHER VIDEOS FOR FAST TIPS **** International 4300 DT466 Cold start This is from a few weeks ago.