6.4L Power Stroke Diagnostics (2008–2010)

Ford Super Duty, 2008-2010 — the first common-rail Power Stroke: piezo injectors, compound turbos (a variable-geometry high-pressure turbo and a fixed-geometry low-pressure turbo), EGR with a cooler, and the first Power Stroke DPF. No SCR/DEF. Fuel-leak, compound-turbo, EGR, DPF-regen and injector codes.

Common symptoms

• Black Smoke From the Exhaust — 6.4 Power Stroke Diagnostic reference for black smoke from the exhaust on 2008–2010 6.4L Power Stroke trucks. Covers DPF, injector and turbocharger-related causes, with…
• Coolant Loss or White Smoke From the Exhaust — 6.4 Power Stroke A diagnostic reference for 2008–2010 Ford 6.4L Power Stroke trucks showing coolant loss or white smoke from the exhaust. Focuses on EGR cooler failure and…
• Frequent or Failed DPF Regenerations — 6.4 Power Stroke The 6.4L Power Stroke regenerates its DPF often. Regens that come too often or never finish usually mean a faulty DPF pressure sensor or melted/cracked sensor…
• Fuel in the Oil or Rising Oil Level — 6.4 Power Stroke Diagnostic reference for fuel dilution and rising oil level on 2008-2010 6.4L Power Stroke. Covers typical causes and how to diagnose them without performing…
• Hard Start or No Start — 6.4 Power Stroke A concise diagnostic reference for hard start / long crank / cranks-no-start on 2008-2010 6.4L Power Stroke. Focuses on fuel rail pressure, high-pressure…
• Loss of Power or Limp Mode — 6.4 Power Stroke Loss of power or limp mode on the 6.4L Power Stroke is the engine protecting itself from a condition that can damage the engine or aftertreatment. On this…
• Rough Idle or Misfire — 6.4 Power Stroke A rough idle or misfire on the 2008–2010 6.4L Power Stroke usually points to an injector — weak, leaking or with a circuit fault — or, when it is worst cold…

• P0234 — Turbocharger/Supercharger Overboost Condition — 6.4 Power Stroke Diagnostic reference for 6.4 Power Stroke (2008–2010) overboost.
• P0299 — Turbocharger/Supercharger Underboost Condition — 6.4 Power Stroke Diagnostic reference for P0299 on 6.4L Power Stroke (2008-2010).
• P2262 — Turbocharger Boost Pressure Not Detected — 6.4 Power Stroke Diagnostic reference for P2262 on 6.4L Power Stroke 2008-2010. Do not repeat the generic definition or platform note in cause descriptions or diagnosis steps.
• P2263 — Turbocharger/Supercharger Boost System Performance — 6.4 Power Stroke P2263 on the 6.4L Power Stroke means the PCM sees actual boost deviating from desired boost over a range of conditions. On this platform the engine uses twin…
• P0101 — Mass or Volume Air Flow Sensor A Circuit Range/Performance — 6.4 Power Stroke P0101 on the 6.4L Power Stroke means the PCM sees a MAF signal that is implausible for current operating conditions. On this platform the MAF feeds load…
• P0201 — Injector Circuit/Open - Cylinder 1 — 6.4 Power Stroke Diagnostic reference for 6.4L Power Stroke (2008-2010) P0201.
• P0405 — Exhaust Gas Recirculation Sensor A Circuit Low — 6.4 Power Stroke Diagnostic reference for the 6.4L Power Stroke (2008-2010) EGR position sensor circuit low code.
• P0471 — Exhaust Pressure Sensor A Circuit Range/Performance — 6.4 Power Stroke Exhaust Pressure Sensor A Circuit Range/Performance
• P0544 — Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1 — 6.4 Power Stroke Diagnostic reference for P0544 on 2008-2010 6.4L Power Stroke.
• P0683 — Glow Plug Control Module to PCM Communication Circuit — 6.4 Power Stroke Diagnostic reference for P0683 on 2008–2010 Ford 6.4L Power Stroke.
• P2032 — Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 2 — 6.4 Power Stroke P2032 on the 6.4L Power Stroke indicates the bank 1 sensor 2 exhaust gas temperature sensor signal voltage is below its valid range. On this platform the EGT…
• P2033 — Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 2 — 6.4 Power Stroke Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 2
• P2269 — Water in Fuel Condition — 6.4 Power Stroke Diagnostic reference for P2269 on 6.4L Power Stroke (2008-2010).
• P2453 — Diesel Particulate Filter Differential Pressure Sensor A Circuit Range/Performance — 6.4 Power Stroke Diesel Particulate Filter Differential Pressure Sensor A Circuit Range/Performance
• P2458 — Diesel Particulate Filter Regeneration Duration — 6.4 Power Stroke P2458 indicates an active DPF regeneration exceeded the allowed time on a 6.4L Power Stroke. The PCM monitors regeneration progress with DPF differential…
• P0546 — Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1 — 6.4 Power Stroke P0546 indicates the exhaust gas temperature sensor bank 1 sensor 1 signal voltage is above its valid range. On the 6.4L Power Stroke, EGT sensors around the…
• P2457 — Exhaust Gas Recirculation Cooling System Performance — 6.4 Power Stroke P2457 on the 2008-2010 6.4L Power Stroke indicates the PCM has detected the EGR cooler is not cooling recirculated exhaust gas as expected. On this platform…
• P0087 — Fuel Rail/System Pressure Too Low — 6.4 Power Stroke Measured fuel rail pressure is below the PCM's commanded value.
• P0088 — Fuel Rail/System Pressure Too High — 6.4 Power Stroke Measured fuel rail pressure exceeds the commanded value on the 6.4L Power Stroke common-rail system.
• P0093 — Fuel System Leak Detected - Large Leak — 6.4 Power Stroke Diagnostic reference for 6.4L Power Stroke (2008–2010).
• P0094 — Fuel System Leak Detected - Small Leak — 6.4 Power Stroke Diagnostic reference for 6.4L Power Stroke (2008–2010) common-rail system.
• P0128 — Coolant Thermostat Below Regulating Temperature — 6.4 Power Stroke Engine coolant does not reach the expected operating temperature in the expected time.
• P0263 — Cylinder 1 Contribution/Balance Fault — 6.4 Power Stroke P0263 is a contribution/balance fault for cylinder 1 on the 6.4L Power Stroke. The PCM detects cylinder 1 output deviating from the others in the Pxx6x family.
• P0401 — Exhaust Gas Recirculation Flow Insufficient — 6.4 Power Stroke Diagnostic reference for 6.4L Power Stroke (2008–2010) EGR flow insufficient.
• P0402 — Exhaust Gas Recirculation Flow Excessive — 6.4 Power Stroke Diagnostic reference for 6.4L Power Stroke 2008-2010.
• P0404 — Exhaust Gas Recirculation Control Circuit Range/Performance — 6.4 Power Stroke Diagnostic reference for 6.4L Power Stroke 2008-2010.
• P0420 — Catalyst System Efficiency Below Threshold — 6.4 Power Stroke Diagnostic reference for 6.4L Power Stroke 2008-2010. P0420 is a generic catalyst efficiency code that on this platform maps to DOC (oxidation-catalyst)…
• P042E — Exhaust Gas Recirculation Control Stuck Open — 6.4 Power Stroke Exhaust Gas Recirculation Control Stuck Open
• P2002 — Diesel Particulate Filter Efficiency Below Threshold (Bank 1) — 6.4 Power Stroke Diagnostic reference for 6.4L Power Stroke (2008–2010) DPF efficiency below threshold.
• P244A — Diesel Particulate Filter Differential Pressure Too Low (Bank 1) — 6.4 Power Stroke Diesel Particulate Filter Differential Pressure Too Low (Bank 1)
• P244B — Diesel Particulate Filter Differential Pressure Too High (Bank 1) — 6.4 Power Stroke The PCM sees a pressure difference across the DPF that is higher than expected, indicating excessive restriction in the aftertreatment path. On the 6.4L Power…
• P2459 — Diesel Particulate Filter Regeneration Frequency — 6.4 Power Stroke P2459 indicates the PCM has detected DPF regenerations occurring more often than expected on a 6.4L Power Stroke (2008-2010). The code is a valid DPF…
• P2463 — Diesel Particulate Filter Restriction - Soot Accumulation — 6.4 Power Stroke P2463 indicates the PCM has detected excessive soot loading in the DPF, restricting exhaust flow on the 6.4L Power Stroke.