2003 Dodge Ram 2500 SLT Cummins 5.9 - Stalling in Rain with P0652, P0237, P2269, P0193, P2509, P0341, P0251, P2266 Fault Codes
My 2003 Dodge Ram 2500 SLT with a 5.9L Cummins engine is experiencing intermittent stalling and hesitation whenever it rains or gets wet. The truck will begin to stutter, then stall completely, causing the check engine light to illuminate and remain on for one to two days. After stalling, when attempting to restart, the engine turns over for several seconds, fires up briefly, and then dies again. This behavior only occurs in wet conditions—when dry, the truck runs smoothly without any issues. I have retrieved the following diagnostic trouble codes (DTCs) from the OBD2 system, listed in the order they were detected: - P0652: Powertrain Control Module (PCM) Input Circuit Malfunction - P0237: Injector Control Pressure Sensor Circuit Malfunction - P2269: EGR Valve Position Sensor Circuit Malfunction - P0193: Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 3) - P2509: Exhaust Gas Recirculation (EGR) System Performance Issue - P0341: Camshaft Position Sensor 'A' Range/Performance Problem - P0251: EGR Valve Control Circuit Malfunction - P2266: EGR Valve Position Sensor Circuit Malfunction (Duplicate code) These codes appear to be related to sensor failures and potential moisture-related electrical interference, especially during wet conditions. I'm seeking advice on how to diagnose and resolve these issues, particularly focusing on the role of water ingress or corrosion in the engine control system.
I've noticed a similar issue—my tachometer fluctuates wildly between my set RPM and zero. Additionally, both the brake and ABS warning lights have come on and remain illuminated even after multiple resets. This could indicate a deeper electrical or sensor fault, possibly related to moisture intrusion in the engine control module or wiring harness.