6.7L Cummins Diagnostics (2013–present, SCR / DEF)

Ram 2500/3500 (and 3500-5500 cab-chassis), 2013-present — 6.7L Cummins with EGR, DPF and SCR/DEF. CP3 (CP4.2 on 2019-2020 only), electric VGT. The full emissions code set plus fuel, boost and sensor faults.

• P0087 — Fuel Rail/System Pressure Too Low (6.7 Cummins (SCR / DEF)) Measured fuel rail pressure is below the PCM's commanded value on 6.7L Cummins SCR/DEF 2013–present.
• P0088 — Fuel Rail/System Pressure Too High (6.7 Cummins (SCR / DEF)) Measured fuel rail pressure is higher than the PCM commanded value on 6.7L Cummins SCR/DEF 2013–present. The system uses a CP3 high-pressure pump for 2013–2018…
• P008A — Low Pressure Fuel System Pressure Too Low (6.7 Cummins (SCR / DEF)) Low Pressure Fuel System Pressure Too Low
• P0090 — Fuel Pressure Regulator Control Circuit (6.7 Cummins (SCR / DEF)) P0090 is an electrical fault detected by the ECM in the circuit that controls the fuel pressure regulator on 6.7L Cummins SCR/DEF trucks. The platform uses a…
• P0128 — Coolant Thermostat Below Regulating Temperature (6.7 Cummins (SCR / DEF)) Engine coolant does not reach the expected operating temperature in the expected time on 6.7L Cummins SCR/DEF 2013–present.
• P0201 — Injector Circuit/Open - Cylinder 1 (6.7 Cummins (SCR / DEF)) P0201 on 6.7L Cummins SCR/DEF 2013–present means the ECM has detected an electrical fault in the fuel injector circuit for cylinder 1.
• P0234 — Turbocharger/Supercharger Overboost Condition (6.7 Cummins (SCR / DEF)) Diagnostic reference for 6.7L Cummins SCR/DEF 2013–present. If sources do not support a point, omit it. Rank causes most-likely first.
• P0263 — Cylinder 1 Contribution/Balance Fault (6.7 Cummins (SCR / DEF)) Diagnostic reference for 6.7L Cummins SCR/DEF 2013–present. If sources do not support a point, leave it out. Describe how to DIAGNOSE, not step-by-step repair…
• P0299 — Turbocharger/Supercharger Underboost Condition (6.7 Cummins (SCR / DEF)) Diagnostic reference for 6.7 Cummins SCR/DEF 2013–present. Turbo is Holset HE300VG VGT with electric actuator + position sensor; no wastegate/vacuum/boost…
• P0401 — Exhaust Gas Recirculation Flow Insufficient (6.7 Cummins (SCR / DEF)) Diagnostic reference for 6.7L Cummins SCR/DEF 2013–present. Rank causes most-likely first.
• P0402 — Exhaust Gas Recirculation Flow Excessive (6.7 Cummins (SCR / DEF)) Diagnostic reference for 6.7L Cummins SCR/DEF 2013–present.
• P0420 — Catalyst System Efficiency Below Threshold (6.7 Cummins (SCR / DEF)) Diagnostic reference for 6.7L Cummins SCR/DEF 2013–present. P0420 is a generic OBD-II catalyst efficiency code that is not used on this platform; the platform…
• P042E — Exhaust Gas Recirculation Control Stuck Open (6.7 Cummins (SCR / DEF)) Exhaust Gas Recirculation Control Stuck Open
• P0471 — Exhaust Pressure Sensor A Circuit Range/Performance (6.7 Cummins (SCR / DEF)) Exhaust Pressure Sensor A Circuit Range/Performance
• P2002 — Diesel Particulate Filter Efficiency Below Threshold (Bank 1) (6.7 Cummins (SCR / DEF)) Diagnostic reference for 6.7 Cummins SCR/DEF 2013–present.
• P203F — Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2 (6.7 Cummins (SCR / DEF)) Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2
• P20E8 — Reductant Pressure Too Low (6.7 Cummins (SCR / DEF)) Diagnostic reference for 6.7L Cummins SCR/DEF 2013–present. P20E8 is a DEF/SCR reductant pressure low code on this platform and is not a fuel-rail pressure…
• P20EE — Diesel Particulate Filter Efficiency Below Threshold (Bank 1) (6.7 Cummins (SCR / DEF)) Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
• P2201 — Oxygen Sensor Signal Circuit Range/Performance Bank 1 Sensor 1 (6.7 Cummins (SCR / DEF)) Diagnostic reference for 6.7L Cummins SCR/DEF 2013–present. P2201 is a generic oxygen-sensor definition; on this diesel platform the code is used for NOx…
• P2262 — Turbocharger Boost Pressure Not Detected (6.7 Cummins (SCR / DEF)) Diagnostic reference for 6.7 Cummins SCR/DEF 2013–present. Turbo is Holset HE300VG VGT with electric actuator + integrated position sensor; no…
• P226C — Turbocharger/Supercharger Boost Control A Position Exceeded Learning Limit (6.7 Cummins (SCR / DEF)) Diagnostic reference for 6.7 Cummins SCR/DEF 2013–present.
• P2452 — Diesel Particulate Filter Pressure Sensor A Circuit (6.7 Cummins (SCR / DEF)) P2452 is a generic OBD-II code for a DPF differential-pressure sensor circuit fault on the 6.7L Cummins SCR/DEF platform.
• P2459 — Diesel Particulate Filter Regeneration Frequency (6.7 Cummins (SCR / DEF)) P2459 is a generic DPF regeneration frequency monitor code; on the 6.7 Cummins SCR/DEF 2013–present it typically sets when the ECM counts excessive active…
• P2609 — Intake Air Heater 'A' Circuit High (6.7 Cummins (SCR / DEF)) P2609 on 6.7L Cummins SCR/DEF 2013–present means the PCM has detected voltage in the intake-air grid-heater 'A' circuit above the expected range. The platform…
• P2BAD — Diesel Particulate Filter Differential Pressure Sensor Circuit Range/Performance (6.7 Cummins (SCR / DEF)) P2BAD on 6.7 Cummins SCR/DEF 2013–present is a NOx-related SCR performance code, not a DPF differential-pressure sensor code.