Diesel Trouble Codes

P2262 — Turbocharger Boost Pressure Not Detected (6.4 Power Stroke)

Diagnostic reference for 6.4L Power Stroke (2008-2010) twin sequential fixed-geometry turbos. Code sets when the PCM sees boost lower than expected or not…

Updated September 2, 2026

What it means

The engine control module has detected that turbocharger boost pressure is lower than expected or not detected. On the 6.4L Power Stroke this platform uses twin sequential fixed-geometry turbos with no VGT/vanes.1

Most likely causes

  1. Boost pressure sensor or MAP/Baro circuit fault causing no valid boost reading — Sensor, wiring, or connector issue prevents the PCM from seeing boost; the code is about detection, not necessarily mechanical loss.1
  2. Large boost/intake leak or disconnected charge-air piping between low-pressure and high-pressure turbos and intake manifold — Unmetered air loss after the low-pressure turbo reduces measured boost; typical on compound fixed-geometry systems.12
  3. Turbocharger mechanical failure or seized/damaged turbine/compressor (high-pressure or low-pressure turbo) — Loss of boost generation due to turbo damage; platform boost faults include mechanical issues.1
  4. Exhaust restriction or pre-turbine blockage limiting turbine drive — Exhaust backpressure rise reduces turbo speed; boost system performance codes are related on this platform.3
  5. Boost control plumbing/valve issue affecting compound turbo operation — Control valves or lines that influence sequential operation can cause boost not detected/underboost conditions.2

How to diagnose

  1. Verify freeze frame and confirm P2262 is present with related boost codes P0299/P2263/P0234.
  2. Inspect charge-air system for disconnected or split boots, intercooler end tanks, and cracked piping from low-pressure turbo to high-pressure turbo to intake.
  3. Check boost pressure sensor/MAP sensor and barometric sensor readings at key-on and idle vs. spec; inspect wiring and connectors for corrosion or damage.
  4. Perform a controlled boost leak test using regulated shop air on the charge system with soapy water to locate leaks.
  5. Inspect both sequential turbos for shaft play, oil contamination, and turbine/compressor damage; check for debris ingestion.
  6. Inspect exhaust for restriction upstream of turbos and verify EGR cooler/valve operation is not causing excessive backpressure.
  7. Review live data for desired vs. actual boost, engine load, and fuel rail pressure to separate boost detection issues from fueling problems.

Parts and tools you may need

Rough cost and difficulty

Parts and labor vary by region and extent of damage; turbocharger replacement on twin sequential systems is high cost. NHTSA complaints note high repair costs for fuel system failures on this platform, e.g., ~$10k reported for high-pressure fuel pump failure and ~$13k for high/low pressure fuel pump issues.

When to see a pro

If turbocharger replacement or internal engine inspection is indicated, have a qualified diesel technician perform the work. Do not disassemble high-pressure fuel components or perform safety-critical repairs without proper training and tools.

Sources

  1. Curated DTC seed — 6.4 Power Stroke (curated) ↩︎ ↩︎ ↩︎ ↩︎

  2. Curated DTC seed — 6.4 Power Stroke (curated) ↩︎ ↩︎

  3. Curated DTC seed — 6.4 Power Stroke (curated) ↩︎