Jul 21, 2011 · What do heck does Trouble Code P0603 (Internal Circuit Mod. KAM error) mean? Thanks, Griz

Oct 4, 2008 · This could be caused by a module disconnect, programming, low battery, disconnected battery or a wiring concern that causes KAM power to be removed. Like most codes, a P0603 is …

Sep 28, 2006 · KeepAliveMemory=KAM=P0603 it means the power was interupted to the PCM at some point. You can't cause this code by pressing the accellerator pedal. The code causes no trouble and …

Dec 31, 2009 · I started my truck up this morning.... and out of the blue it threw a CEL with code # P0603: Power Interruption on (KAPWR) circuit. I tried to reset this code a couple of times but it pops …

Jan 9, 2025 · The only code I am getting on the OB2 test is a P0603 power interruption on KAPWR circuit. Last thing when it cranks, it doesn't sound normal instead of the what I would describe as the …

Jul 21, 2009 · The P0603 is because you installed the tune. You'll get the same thing if you disconnect power to the PCM, and is not a problem. The P1211 means your HPOP can't keep up with the …

Jul 22, 2014 · p0603 is a Keep Alive Memory code - usually triggered when the battery is disconnected. I would advise clearing the codes and see what comes back.

Jun 26, 2017 · My Excursion 7.3 is running in limp mode, the problem is a P1280 code, and P0603. I think the is something with the wiring or the PCM. The problem is that when driving, the engine will …

Aug 21, 2023 · P0603 indicates the PCM has experienced a power interrupt in the KAPWR circuit. Post pics of the battery terminals. P0470/472/478 relate to the EBP, and have contradictory meanings, …

Aug 12, 2005 · I got an P0603 after reporogramming back to stock with my Superchips tuner. 1999 F250 Lariat 4X4, Supercab, Longbed, 7.3L PSD, 4" Flowmaster exhaust, Superchips Tuner.