6.7L Cummins Diagnostics (2007.5–2012, EGR + DPF)

Dodge/Ram 2500/3500, 2007.5-2012 — the first 6.7L Cummins: CP3 common rail, electric VGT, EGR, DOC, NOx adsorber and DPF. No SCR/DEF. Boost-actuator, EGR, DPF and fuel codes.

Common symptoms

Black Smoke Under Load — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for black smoke under load on 2007.5–2012 6.7L Cummins EGR+DPF pre-SCR.
Engine Stalls or Dies While Driving — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic guide for 6.7 Cummins (EGR + DPF, pre-SCR) 2007.5–2012 when the engine stalls or dies while driving or at idle. Focuses on fuel-system loss of rail…
Frequent DPF Regenerations — 6.7 Cummins (EGR + DPF, pre-SCR) The 6.7 Cummins 2007.5–2012 uses EGR + DOC + NAC + DPF with no SCR/DEF. Frequent or constant regenerations mean the aftertreatment control is seeing a soot…
Hard Start or Long Crank — 6.7 Cummins (EGR + DPF, pre-SCR) A diagnostic guide for hard start or long crank on 6.7 Cummins (EGR + DPF, pre-SCR) 2007.5–2012.
Loss of Power or Limp Mode — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for 2007.5–2012 6.7L Cummins (EGR + DPF, pre-SCR) when the engine goes into limp mode or loses power, often with no boost. Covers VGT…
Rough Idle and White Smoke on Cold Start — 6.7 Cummins (EGR + DPF, pre-SCR) Guide for 6.7 Cummins (EGR + DPF, pre-SCR) 2007.5–2012 showing rough idle and white smoke on cold start.

P0046 — Turbocharger/Supercharger Boost Control A Circuit Range/Performance — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for 6.7 Cummins 2007.5–2012 (EGR+DPF, pre-SCR) with HE351VE VGT and electric actuator with integrated position sensor. No wastegate, no…
P0403 — Exhaust Gas Recirculation A Control Circuit — 6.7 Cummins (EGR + DPF, pre-SCR) P0403 indicates the ECM has detected a fault in the EGR valve control circuit on the 6.7L Cummins 2007.5-2012 (EGR+DPF, pre-SCR).
P0472 — Exhaust Pressure Sensor A Circuit Low — 6.7 Cummins (EGR + DPF, pre-SCR) The exhaust back pressure sensor signal voltage is below its valid range on a 6.7L Cummins (EGR + DPF, pre-SCR).
P0544 — Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1 — 6.7 Cummins (EGR + DPF, pre-SCR) P0544 on 6.7 Cummins (EGR+DPF, pre-SCR) indicates an electrical fault in the Bank 1 Sensor 1 exhaust gas temperature sensor circuit. The ECM uses EGT inputs to…
P2032 — Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 2 — 6.7 Cummins (EGR + DPF, pre-SCR) Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 2
P242F — Diesel Particulate Filter Restriction - Ash Accumulation — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for 6.7 Cummins 2007.5–2012 (EGR + DPF, pre-SCR).
P2453 — Diesel Particulate Filter Differential Pressure Sensor A Circuit Range/Performance — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for 6.7 Cummins 2007.5–2012 (EGR+DPF, pre-SCR).
P2463 — Diesel Particulate Filter Restriction - Soot Accumulation — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for 6.7 Cummins 2007.5–2012 EGR+DPF pre-SCR.
P226C — Turbocharger/Supercharger Boost Control A Slow Response — 6.7 Cummins (EGR + DPF, pre-SCR) P226C on 6.7 Cummins 2007.5–2012 (EGR+DPF, pre-SCR) means the ECM sees the VGT boost control respond slower than expected to its commands. The HE351VE uses an…
P2609 — Intake Air Heater System Performance — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for P2609 on 6.7 Cummins 2007.5–2012 EGR+DPF pre-SCR. Focus on intake grid heater performance, cold-start behavior, and electrical supply…
P0045 — Turbocharger Boost Control Solenoid A Circuit/Open — 6.7 Cummins (EGR + DPF, pre-SCR) P0045 is a generic OBD-II code for an electrical fault in the turbocharger boost control solenoid A circuit. On the 2007.5–2012 6.7L Cummins (EGR+DPF, pre-SCR)…
P0087 — Fuel Rail/System Pressure Too Low — 6.7 Cummins (EGR + DPF, pre-SCR) Measured fuel rail pressure is below the PCM's commanded value on a 6.7L Cummins 2007.5–2012 (EGR+DPF, pre-SCR).
P0088 — Fuel Rail/System Pressure Too High — 6.7 Cummins (EGR + DPF, pre-SCR) Measured fuel rail pressure exceeds the commanded value on 6.7 Cummins 2007.5–2012 (EGR+DPF, pre-SCR).
P008A — Low Pressure Fuel System Pressure Too Low — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for 6.7 Cummins 2007.5–2012 EGR+DPF pre-SCR with code P008A.
P0090 — Fuel Pressure Regulator Control Circuit — 6.7 Cummins (EGR + DPF, pre-SCR) P0090 means the ECM has detected an electrical fault in the circuit that controls the fuel pressure regulator on a 6.7L Cummins 2007.5–2012 EGR+DPF pre-SCR.
P0128 — Coolant Thermostat Below Regulating Temperature — 6.7 Cummins (EGR + DPF, pre-SCR) Engine coolant does not reach the expected operating temperature in the expected time. On 6.7L Cummins 2007.5–2012 EGR+DPF pre-SCR the thermostat is a…
P0193 — Fuel Rail Pressure Sensor A Circuit High — 6.7 Cummins (EGR + DPF, pre-SCR) P0193 means the ECM sees the fuel rail pressure sensor voltage out of range high on a 6.7L Cummins 2007.5–2012 with CP3 common rail, in-tank lift pump, VGT…
P0201 — Injector Circuit/Open - Cylinder 1 — 6.7 Cummins (EGR + DPF, pre-SCR) The ECM has detected an electrical fault in the fuel injector circuit for cylinder 1 on a 6.7L Cummins 2007.5–2012 (EGR+DPF, pre-SCR).
P0202 — Injector Circuit Malfunction Cylinder 2 — 6.7 Cummins (EGR + DPF, pre-SCR) The engine control module has detected an electrical fault in the fuel injector circuit for cylinder number two.
P0234 — Turbocharger/Supercharger Overboost Condition — 6.7 Cummins (EGR + DPF, pre-SCR) P0234 on 6.7 Cummins 2007.5–2012 EGR+DPF pre-SCR means the ECM has detected boost pressure above the allowed maximum for current conditions. On this platform…
P0263 — Cylinder 1 Contribution/Balance Fault — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for 6.7L Cummins 2007.5–2012 (EGR+DPF, pre-SCR) with CP3 common rail, in-tank lift pump, VGT HE351VE with electric actuator, NAC+DPF, no…
P0299 — Turbocharger/Supercharger Underboost Condition — 6.7 Cummins (EGR + DPF, pre-SCR) P0299 on 6.7 Cummins 2007.5–2012 means boost pressure is below the minimum expected for current conditions. On this platform the turbo is a Holset HE351VE VGT…
P0401 — Exhaust Gas Recirculation Flow Insufficient — 6.7 Cummins (EGR + DPF, pre-SCR) Exhaust Gas Recirculation Flow Insufficient
P0402 — Exhaust Gas Recirculation Flow Excessive — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for 6.7L Cummins 2007.5–2012 EGR+DPF pre-SCR.
P0404 — Exhaust Gas Recirculation Control Circuit Range/Performance — 6.7 Cummins (EGR + DPF, pre-SCR) Exhaust Gas Recirculation Control Circuit Range/Performance
P0420 — Catalyst System Efficiency Below Threshold — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for 6.7 Cummins 2007.5–2012 EGR+DPF pre-SCR. P0420 is atypical/rare on this platform; catalyst efficiency monitoring is tied to DPF/regen…
P042E — Exhaust Gas Recirculation Control Stuck Open — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for 6.7L Cummins 2007.5–2012 (EGR + DPF, pre-SCR).
P0471 — Exhaust Pressure Sensor A Circuit Range/Performance — 6.7 Cummins (EGR + DPF, pre-SCR) Exhaust Pressure Sensor A Circuit Range/Performance
P2002 — Diesel Particulate Filter Efficiency Below Threshold (Bank 1) — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for 6.7 Cummins 2007.5–2012 EGR+DPF pre-SCR. P2002 indicates the ECM judges DPF filtering efficiency below threshold using…
P2262 — Turbocharger Boost Pressure Not Detected — 6.7 Cummins (EGR + DPF, pre-SCR) Diagnostic reference for 6.7L Cummins 2007.5–2012 EGR+DPF pre-SCR with HE351VE VGT and electric actuator/position sensor. No wastegate/vacuum/boost solenoid on…
P2452 — Diesel Particulate Filter Pressure Sensor A Circuit — 6.7 Cummins (EGR + DPF, pre-SCR) P2452 is a DPF differential-pressure sensor circuit fault on the 6.7L Cummins 2007.5–2012 (EGR+DPF, pre-SCR).
P2459 — Diesel Particulate Filter Regeneration Frequency — 6.7 Cummins (EGR + DPF, pre-SCR) P2459 indicates the ECM has detected that DPF regenerations are occurring more often than expected on a 6.7L Cummins 2007.5–2012 EGR+DPF pre-SCR platform.