P1689 Code: Easy Steps to Solve It
The P1689 trouble code is a diagnostic trouble code (DTC) that indicates a communication issue between the Engine Control Module (ECM) and the Fuel Injection Pump Control Module (FPCM). This code is particularly relevant in diesel engines, especially those equipped with the VP44 injection pump, commonly found in Dodge Ram trucks. When this code is triggered, it often leads to performance issues, including engine stalling,