5.9L Cummins Common Rail Diagnostics

Dodge Ram 2500/3500, 2003-2007 — the CP3 common-rail 5.9L with solenoid injectors and a fixed-geometry turbo. No DPF. Rail-pressure, injector, FCA and sensor codes.

Common symptoms

Engine Stalls or Dies While Driving — 5.9 Cummins Common Rail Diagnostic guide for 5.9 Cummins Common Rail (2003–2007) when the engine stalls or dies while driving.
Hard Start or No Start — 5.9 Cummins Common Rail A 5.9L Cummins Common Rail that cranks but takes a long time to fire or fails to start at all. Owners often describe it as a hard start, long crank, or…
Loss of Power or Limp Mode — 5.9 Cummins Common Rail Diagnostic reference for 2003-2007 Dodge Ram 2500/3500 5.9L Cummins Common Rail when the engine goes into reduced power/limp mode or shows no boost.
Rough Idle, Misfire or Injector Knock — 5.9 Cummins Common Rail Diagnostic reference for rough idle, misfire or injector knock on 2003–2007 Dodge Ram 2500/3500 ISB 5.9 common rail.
Surging or Erratic Throttle Response — 5.9 Cummins Common Rail Diagnostic reference for surging or erratic throttle response on the 2003–2007 Dodge Ram 2500/3500 ISB 5.9 common rail. Focuses on accelerator pedal sensor…
White Smoke or Rough Running on Cold Start — 5.9 Cummins Common Rail White smoke or rough running on cold start on a 5.9 Cummins Common Rail (2003–2007).

P0148 — Fuel Delivery Error — 5.9 Cummins Common Rail P0148 is a Cummins-enhanced code for the 5.9L common rail that indicates the ECM has detected fuel delivery does not match expected values. On this platform…
P0191 — Fuel Rail Pressure Sensor A Circuit Range/Performance — 5.9 Cummins Common Rail P0191 on the 5.9L Cummins Common Rail (2003-2007) means the ECM sees the rail-pressure sensor signal drifting or otherwise implausible for operating…
P0237 — Turbocharger/Supercharger Boost Sensor A Circuit Low — 5.9 Cummins Common Rail Diagnostic reference for 5.9 Cummins Common Rail 2003-2007 (ISB 5.9 common rail).
P2121 — Throttle/Pedal Position Sensor/Switch D Circuit Range/Performance — 5.9 Cummins Common Rail Diagnostic reference for 5.9L Cummins Common Rail 2003-2007 Dodge Ram 2500/3500.
P2262 — Turbocharger/Supercharger Boost Pressure Not Detected - Mechanical — 5.9 Cummins Common Rail Diagnostic reference for 5.9 Cummins Common Rail 2003-2007 Dodge Ram 2500/3500 ISB. Code P2262 indicates the ECM expected boost but did not detect it. On this…
P2509 — ECM/PCM Power Input Signal Intermittent — 5.9 Cummins Common Rail Diagnostic reference for 5.9 Cummins Common Rail 2003–2007.
P0087 — Fuel Rail/System Pressure Too Low — 5.9 Cummins Common Rail Measured fuel rail pressure is below the PCM's commanded value on the 5.9L Cummins Common Rail 2003-2007 ISB.
P0088 — Fuel Rail/System Pressure Too High — 5.9 Cummins Common Rail Measured fuel rail pressure exceeds the commanded value on the 5.9L Cummins Common Rail 2003–2007 ISB.
P0090 — Fuel Pressure Regulator Control Circuit — 5.9 Cummins Common Rail Fuel Pressure Regulator Control Circuit
P0121 — Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance — 5.9 Cummins Common Rail P0121 on 2003-2007 5.9L Cummins Common Rail means the ECM sees the Accelerator Pedal Position Sensor (APPS) signal outside expected range or inconsistent. APPS…
P0122 — Throttle/Pedal Position Sensor/Switch A Circuit Low Input — 5.9 Cummins Common Rail Diagnostic reference for 5.9L Cummins Common Rail 2003-2007 Dodge Ram 2500/3500 ISB. ECM detects pedal position sensor A voltage lower than expected range.
P0128 — Coolant Thermostat Below Regulating Temperature — 5.9 Cummins Common Rail Engine coolant does not reach the expected operating temperature in the expected time.
P0182 — Fuel Temperature Sensor A Circuit Low — 5.9 Cummins Common Rail Fuel Temperature Sensor A Circuit Low
P0192 — Fuel Rail Pressure Sensor Circuit Low Input — 5.9 Cummins Common Rail Diagnostic reference for 5.9L Cummins Common Rail 2003–2007 (ISB).
P0193 — Fuel Rail Pressure Sensor A Circuit High — 5.9 Cummins Common Rail Diagnostic reference for 5.9L Cummins Common Rail 2003-2007 (ISB 5.9 common rail).
P0201 — Injector Circuit/Open - Cylinder 1 — 5.9 Cummins Common Rail Diagnostic reference for P0201 on 5.9 Cummins Common Rail 2003-2007.
P0202 — Injector Circuit/Open - Cylinder 2 — 5.9 Cummins Common Rail P0202 on 5.9 Cummins Common Rail 2003-2007 means the ECM detected an electrical fault in the fuel injector circuit for cylinder 2. Injectors are Bosch…
P0203 — Injector Circuit/Open - Cylinder 3 — 5.9 Cummins Common Rail P0203 means the ECM detected an electrical fault in the injector circuit for cylinder #3 on a 5.9L Cummins Common Rail 2003-2007 ISB. Injectors are Bosch…
P0204 — Injector Circuit/Open Cylinder 4 — 5.9 Cummins Common Rail Diagnostic reference for P0204 on 5.9L Cummins Common Rail 2003-2007.
P0205 — Injector Circuit/Open - Cylinder 5 — 5.9 Cummins Common Rail The ECM has detected an electrical fault in the injector circuit for cylinder 5 on a 5.9L Cummins Common Rail 2003-2007.
P0206 — Injector Circuit/Open - Cylinder 6 — 5.9 Cummins Common Rail Diagnostic reference for P0206 on 5.9L Cummins Common Rail 2003-2007.
P0221 — Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance — 5.9 Cummins Common Rail Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance
P0234 — Turbocharger/Supercharger Overboost Condition — 5.9 Cummins Common Rail Diagnostic reference for 5.9L Cummins Common Rail 2003-2007 ISB. Code sets when boost pressure exceeds the maximum allowed for current conditions. Platform has…
P0263 — Cylinder 1 Contribution/Balance Fault — 5.9 Cummins Common Rail Diagnostic reference for 5.9L Cummins Common Rail 2003–2007 ISB.
P0299 — Turbocharger/Supercharger Underboost Condition — 5.9 Cummins Common Rail Diagnostic reference for 5.9L Cummins Common Rail 2003-2007 Dodge Ram 2500/3500 ISB. Fixed-geometry Holset turbo with wastegate; no VGT. Underboost means…
P0336 — Crankshaft Position Sensor A Circuit Range/Performance — 5.9 Cummins Common Rail Diagnostic reference for 5.9L Cummins Common Rail (2003-2007) Dodge Ram 2500/3500 ISB.
P0341 — Camshaft Position Sensor A Circuit Range/Performance — 5.9 Cummins Common Rail P0341 on the 5.9L Cummins Common Rail (2003–2007) means the ECM sees the camshaft position sensor signal outside the expected range or performance. The engine…
P0380 — Glow Plug/Heater Circuit Malfunction — 5.9 Cummins Common Rail P0380 is a generic OBD-II code for a glow-plug/heater circuit electrical fault detected by the ECM. On the 2003-2007 5.9L Cummins Common Rail this code does…