5.9L Cummins 24-Valve (VP44) Diagnostics

Dodge Ram 2500/3500, 1998.5-2002 — the 24-valve ISB with the Bosch VP44 electronic injection pump, fixed-geometry turbo, and no emissions system. Lift-pump, APPS/pedal, VP44 and sensor faults dominate.

P0107 — Manifold Absolute Pressure/Barometric Pressure Circuit Low (5.9 Cummins 24-Valve (VP44)) Diagnostic reference for 5.9L Cummins 24-Valve (VP44) 1998.5–2002.
P0117 — Engine Coolant Temperature Circuit Low Input (5.9 Cummins 24-Valve (VP44)) Diagnostic reference for 5.9L Cummins 24-Valve (VP44) 1998.5–2002. Focus on diagnosing the ECT circuit low-input condition without step-by-step repair of…
P0122 — Throttle/Pedal Position Sensor/Switch A Circuit Low Input (5.9 Cummins 24-Valve (VP44)) Diagnostic reference for 5.9L Cummins 24-Valve VP44 (1998.5–2002) P0122. Focus on APPS circuit low voltage detection and related drivability symptoms. Do not…
P0123 — Throttle/Pedal Position Sensor/Switch A Circuit High Input (5.9 Cummins 24-Valve (VP44)) P0123 on the 5.9L Cummins 24-Valve VP44 means the ECM is seeing an APPS voltage above the expected range. On this platform the accelerator pedal position…
P0128 — Coolant Thermostat Below Regulating Temperature (5.9 Cummins 24-Valve (VP44)) Engine coolant does not reach the expected operating temperature in the expected time.
P0182 — Fuel Temperature Sensor A Circuit Low (5.9 Cummins 24-Valve (VP44)) Fuel Temperature Sensor A Circuit Low
P0216 — Injection Timing Control Circuit Malfunction (5.9 Cummins 24-Valve (VP44)) P0216 on the 5.9L Cummins 24-valve VP44 means the ECM has detected an issue with the injection timing control circuit or its performance. On this platform the…
P0221 — Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance (5.9 Cummins 24-Valve (VP44)) Diagnostic reference for 5.9L Cummins 24-Valve VP44 1998.5-2002. Focus on APPS circuit range/performance faults and how to diagnose them without repairing…
P0230 — Fuel Pump Primary Circuit (5.9 Cummins 24-Valve (VP44)) The engine control module has detected an electrical fault in the primary control circuit of the fuel pump on a 5.9L Cummins 24-Valve (VP44) 1998.5–2002 Dodge…
P0232 — Turbocharger Boost Sensor A Circuit High (5.9 Cummins 24-Valve (VP44)) Diagnostic reference for 5.9L Cummins 24-Valve VP44 (1998.5–2002) when ECM reports P0232. Focus on electrical diagnosis of the boost pressure sensor circuit…
P0234 — Turbocharger/Supercharger Overboost Condition (5.9 Cummins 24-Valve (VP44)) P0234 on the 5.9L Cummins 24-Valve VP44 means the ECM has seen boost pressure above the allowed limit for current conditions. On this platform the turbo is a…
P0336 — Crankshaft Position Sensor A Circuit Range/Performance (5.9 Cummins 24-Valve (VP44)) Diagnostic reference for 5.9L Cummins 24-Valve VP44 (1998.5–2002) when ECM reports crankshaft position sensor signal erratic/out of range.
P0341 — Camshaft Position Sensor A Circuit Range/Performance (5.9 Cummins 24-Valve (VP44)) Diagnostic reference for 5.9L Cummins 24-Valve (VP44) 1998.5–2002.
P0380 — Glow Plug/Heater Circuit Malfunction (5.9 Cummins 24-Valve (VP44)) P0380 is a generic OBD-II code for a glow plug/heater circuit electrical fault. On the 5.9L Cummins 24-Valve VP44 platform the engine uses an intake-air grid…
P0480 — Cooling Fan 1 Control Circuit (5.9 Cummins 24-Valve (VP44)) The engine control module has detected an electrical fault in the control circuit for cooling fan 1.
P0500 — Vehicle Speed Sensor A Malfunction (5.9 Cummins 24-Valve (VP44)) Diagnostic reference for P0500 on 5.9L Cummins 24-Valve (VP44) 1998.5–2002.
P0602 — Control Module Programming Error (5.9 Cummins 24-Valve (VP44)) P0602 means the PCM/ECU has detected an internal programming error or corruption on the 5.9L Cummins 24-Valve VP44 platform.
P0605 — Internal Control Module Read Only Memory (ROM) Error (5.9 Cummins 24-Valve (VP44)) P0605 on a 5.9L Cummins 24-Valve (VP44) means the PCM/ECU has detected an internal fault in its non-volatile memory (ROM) that prevents reliable operation of…
P0606 — Control Module Processor Performance (5.9 Cummins 24-Valve (VP44)) P0606 on the 1998.5–2002 Dodge Ram 2500/3500 5.9L Cummins 24-valve (VP44) means the Powertrain Control Module (PCM/ECU) has detected an internal processor…
P1688 — Fuel Injection Pump Encoder Circuit Malfunction (5.9 Cummins 24-Valve (VP44)) P1688 on the 5.9L Cummins 24-Valve (VP44) means the ECM has detected an electrical fault in the fuel injection pump encoder circuit. On this platform the VP44…
P1693 — ... (5.9 Cummins 24-Valve (VP44)) P1693 is a companion/secondary code on the 5.9L Cummins 24-valve VP44 platform. It indicates the PCM has stored another fault in a separate module and is…