6.7L Power Stroke Diagnostics

The 6.7L Power Stroke has powered Ford Super Duty trucks since the 2011 model year. These guides cover the codes and symptoms owners run into most: turbo and boost faults, EGR and DPF issues, hard starting, and limp-mode triggers.

Guides are being published on a rolling schedule.

Common symptoms

Black Smoke Under Load — 6.7 Powerstroke Diagnostic reference for black smoke under load on 2011–present 6.7L Power Stroke.
DEF Warning or Speed Limit Countdown — 6.7 Powerstroke Diagnostic reference for DEF warnings and speed-limit countdown on 6.7L Power Stroke (2011–present).
Engine Stalls or Dies While Driving — 6.7 Powerstroke Diagnostic guide for 6.7 Powerstroke (2011–present) when the engine stalls or dies while driving or at idle.
Frequent DPF Regenerations — 6.7 Powerstroke A diagnostic reference for 6.7 Powerstroke (2011–present) trucks that are regenerating the diesel particulate filter much more often than normal, often…
Hard Start or Long Crank — 6.7 Powerstroke Diagnostic reference for hard start or long crank on 2011–present 6.7L Power Stroke. Covers fuel supply and high-pressure rail pressure loss, air ingress…
Loss of Power or Limp Mode — 6.7 Powerstroke Diagnostic reference for 6.7L Power Stroke (2011–present) loss of power/limp mode. Covers boost/VGT, fuel rail pressure, DPF restriction and emissions derate.…
Rough Idle and White Smoke on Cold Start — 6.7 Powerstroke A concise diagnostic reference for 6.7L Power Stroke (2011–present) rough idle and white smoke on cold start. Focuses on incomplete combustion when cold and…

P0090 — Fuel Pressure Regulator 1 Control Circuit/Open — 6.7 Powerstroke Diagnostic reference for 6.7L Power Stroke (2011–present) P0090.
P0093 — Fuel System Leak Detected - Large Leak — 6.7 Powerstroke Diagnostic reference for 6.7 Powerstroke (2011–present) P0093. Focus on high-pressure fuel leak detection and safe diagnostic steps without performing…
P132B — Turbocharger/Supercharger Boost Control A Performance — 6.7 Powerstroke Diagnostic reference for P132B on 6.7 Powerstroke (2011–present).
P203F — Reductant Level Too Low — 6.7 Powerstroke Diagnostic reference for P203F on 6.7 Powerstroke (2011–present).
P20BD — Reductant Heater B Control Circuit/Open — 6.7 Powerstroke Diagnostic reference for P20BD on 6.7 Powerstroke (2011–present).
P20EE — SCR NOx Catalyst Efficiency Below Threshold (Bank 1) — 6.7 Powerstroke Diagnostic reference for 6.7 Powerstroke (2011–present) P20EE.
P2201 — NOx Sensor Circuit Range/Performance Bank 1 Sensor 1 — 6.7 Powerstroke Diagnostic reference for 6.7 Powerstroke (2011–present) P2201.
P242F — Diesel Particulate Filter Restriction - Ash Accumulation — 6.7 Powerstroke Diagnostic reference for P242F on 6.7 Powerstroke (2011–present).
P2463 — Diesel Particulate Filter Restriction - Soot Accumulation — 6.7 Powerstroke Diagnostic reference for P2463 on 6.7L Power Stroke (2011–present).
P2470 — Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 4) — 6.7 Powerstroke The PCM sees the bank 1 sensor 4 exhaust gas temperature (EGT) sensor signal voltage below its valid range. On the 6.7L Power Stroke several EGT sensors around…
P2BAD — NOx Exceedance - Root Cause Unknown — 6.7 Powerstroke Diagnostic reference for P2BAD on 6.7 Powerstroke (2011–present).
P226C — Turbocharger/Supercharger Boost Control A Slow Response — 6.7 Powerstroke P226C on 6.7 Powerstroke means the PCM detects the VGT boost control responding slower than commanded. The most common root causes are soot-sticking VGT vanes…
P0016 — Crankshaft/Camshaft Position Correlation (Bank 1 Sensor A) — 6.7 Powerstroke P0016 on 6.7 Powerstroke means the PCM sees crank and cam signals out of expected phase. Diagnose sensor/wiring/reluctor issues first; mechanical timing is…
P0087 — Fuel Rail/System Pressure Too Low — 6.7 Powerstroke Diagnostic reference for P0087 on 6.7 Powerstroke (2011–present). Focuses on diagnosing low rail pressure causes without step-by-step repair of safety-critical…
P0088 — Fuel Rail/System Pressure Too High — 6.7 Powerstroke Concise diagnostic reference for P0088 on 6.7 Powerstroke.
P008A — Low Pressure Fuel System Pressure Too Low — 6.7 Powerstroke Diagnostic reference for P008A on 6.7 Powerstroke (2011–present).
P0100 — Mass or Volume Air Flow Circuit Malfunction — 6.7 Powerstroke Diagnostic reference for P0100 on 6.7 Powerstroke.
P0107 — Manifold Absolute Pressure/Barometric Pressure Circuit Low — 6.7 Powerstroke Diagnostic reference for 6.7L Power Stroke (2011–present) P0107.
P0128 — Coolant Thermostat Below Regulating Temperature — 6.7 Powerstroke P0128 on 6.7 Powerstroke means the engine coolant is not reaching expected operating temperature in the expected time. On this platform the typical cause is a…
P0234 — Turbocharger/Supercharger Overboost Condition — 6.7 Powerstroke P0234 on 6.7 Powerstroke means boost pressure has exceeded the maximum allowed for current conditions. The PCM sets the code when measured boost is above the…
P0263 — Cylinder 1 Contribution/Balance Fault — 6.7 Powerstroke P0263 on 6.7 Powerstroke means the PCM has detected cylinder 1 output deviating from the others in the Pxx6x contribution/balance family.
P0299 — Turbocharger/Supercharger Underboost Condition — 6.7 Powerstroke P0299 on 6.7 Powerstroke means boost pressure is below the minimum expected for current conditions.
P0401 — Exhaust Gas Recirculation Flow Insufficient — 6.7 Powerstroke Diagnostic reference for 6.7 Powerstroke (2011–present) P0401.
P0402 — Exhaust Gas Recirculation Flow Excessive — 6.7 Powerstroke Diagnostic reference for P0402 on 6.7 Powerstroke (2011–present).
P0420 — Catalyst System Efficiency Below Threshold — 6.7 Powerstroke Diagnostic reference for 6.7 Powerstroke (2011–present) P0420.
P042E — Exhaust Gas Recirculation Control Stuck Open — 6.7 Powerstroke Diagnostic reference for 6.7 Powerstroke (2011–present) P042E.
P046C — Exhaust Gas Recirculation Position Sensor Circuit Range/Performance — 6.7 Powerstroke Diagnostic reference for 6.7L Powerstroke (2011–present) P046C.
P0470 — Exhaust Pressure Sensor Malfunction — 6.7 Powerstroke Diagnostic reference for P0470 on 6.7L Powerstroke.
P0500 — Vehicle Speed Sensor A Malfunction — 6.7 Powerstroke Diagnostic reference for P0500 on 6.7 Powerstroke. Focus on how to diagnose the vehicle-speed signal issue; do not provide step-by-step repair of…
P0670 — Glow Plug Control Module Circuit — 6.7 Powerstroke P0670 on 6.7 Powerstroke means the PCM has detected a fault in the glow-plug control module circuit. This affects glow plugs and cold start. Typical on this…
P1000 — OBD-II Monitor Testing Not Complete — 6.7 Powerstroke P1000 on a 6.7 Powerstroke means the PCM’s readiness monitors have not finished since the last code clear or battery disconnect. It is informational and does…
P2002 — Diesel Particulate Filter Efficiency Below Threshold (Bank 1) — 6.7 Powerstroke Diagnostic reference for P2002 on 6.7 Powerstroke (2011–present).
P204F — Reductant System Performance — 6.7 Powerstroke P204F means the SCR/DEF system is not achieving expected NOx reduction on 6.7 Powerstroke. Diagnose by confirming reductant quality/delivery and NOx sensor…
P20E8 — Reductant Pressure Too Low — 6.7 Powerstroke P20E8 on 6.7 Powerstroke means the DEF (reductant) delivery pressure is below target. The PCM monitors SCR/DEF pressure and sets the code when measured…
P2263 — Turbocharger/Supercharger Boost System Performance — 6.7 Powerstroke P2263 on 6.7 Powerstroke means actual boost does not track desired boost over a range of conditions. Diagnose boost control faults before assuming turbo…
P2280 — Air Flow Restriction / Air Leak Between Air Filter and MAF — 6.7 Powerstroke Diagnostic reference for 6.7 Powerstroke (2011–present) P2280.
P2452 — Diesel Particulate Filter Pressure Sensor A Circuit — 6.7 Powerstroke P2452 is a generic OBD-II code for a DPF differential-pressure sensor circuit fault on the 6.7 Powerstroke. It indicates an electrical or signal problem with…
P2453 — Diesel Particulate Filter Pressure Sensor A Circuit Range/Performance — 6.7 Powerstroke Diagnostic reference for P2453 on 6.7 Powerstroke. Focus on diagnosing implausible DPF differential-pressure signal and related aftertreatment conditions.
P2459 — Diesel Particulate Filter Regeneration Frequency — 6.7 Powerstroke P2459 means the PCM has counted DPF regenerations more often than expected for the platform. On 6.7L Powerstroke this is a frequency counter, not a single…