Diesel Trouble Codes

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…

Updated September 2, 2026

What it means

The ECM has detected turbocharger boost pressure lower than expected or not detected. On this platform the HE351VE VGT uses an electric actuator with integrated position sensor and no wastegate/vacuum/boost solenoid. Codes P2262/P226C/P0045/P0234/P0299 cluster around VGT actuator.12

Most likely causes

  1. VGT electric actuator or integrated position sensor fault / learned travel out of range — Actuator cannot achieve or report commanded vane position; typical for HE351VE VGT with electric actuator/position sensor, no wastegate/vacuum/boost solenoid. Related codes P2262/P226C/P0045/P0234/P0299 cluster around VGT actuator.12
  2. Boost-pressure signal or MAP sensor / circuit issue — ECM boost detection relies on MAP-based load; MAF is present but used for EGR/emissions, not primary fueling. Low or missing boost reading can set P2262 when pressure is lower than expected.13
  3. Exhaust / intake restriction affecting measured boost — DPF/NAC/DOC restriction or intake blockage can reduce actual boost. Platform has EGR valve+cooler, DOC, NOx adsorber catalyst, DPF; no SCR/DEF.3
  4. VGT vane mechanism sticking / carbon buildup — Mechanical sticking of variable vanes prevents boost build; actuator-related code family on HE351VE VGT with electric actuator/position sensor.2
  5. Wiring / connector / power-ground to VGT actuator — Electrical fault in turbo boost control circuit can be reported as P0045 on this platform; actuator is electric with position sensor, no boost-control solenoid.4

How to diagnose

  1. Verify freeze-frame and repeatability of P2262 with current data; note accompanying codes P226C/P0045/P0234/P0299.
  2. Inspect VGT actuator connector, harness, power and ground; check for corrosion, chafing, pin damage.
  3. Command VGT vane position with scan tool and monitor actual vs desired position and actuator feedback; look for limited travel or position errors indicating learned travel out of range.
  4. Check MAP sensor reading at idle and under load vs expected boost; compare to barometric pressure and engine load. MAF is used for EGR/emissions, not primary fueling.
  5. Inspect intake tract for leaks, collapsed hoses, and air filter restriction; inspect exhaust backpressure/DPF restriction per platform emissions layout.
  6. Perform visual inspection of turbocharger inlet/exhaust for damage and check VGT vane freedom of movement via approved diagnostic actuation; do not disassemble high-pressure fuel components.
  7. Review recent repairs, actuator relearn status, and battery/charging system health that can affect actuator learning.
  8. If actuator electrical tests pass but position error persists, evaluate VGT actuator replacement and relearn procedure per OEM.

Parts and tools you may need

Rough cost and difficulty

Parts and labor vary by region and shop; actuator replacement and relearn are common repairs for this code family on HE351VE VGT.

When to see a pro

If diagnosis indicates internal turbocharger mechanical failure, high-pressure fuel system concerns, or requires removal of emissions components, have a qualified diesel technician perform inspection and repair. Do not service high-pressure fuel lines or attempt internal turbo disassembly without proper training and safety controls.

Sources

  1. Curated DTC seed — 6.7 Cummins (EGR + DPF, pre-SCR) (curated) ↩︎ ↩︎ ↩︎

  2. Curated DTC seed — 6.7 Cummins (EGR + DPF, pre-SCR) (curated) ↩︎ ↩︎ ↩︎

  3. Curated DTC seed — 6.7 Cummins (EGR + DPF, pre-SCR) (curated) ↩︎ ↩︎

  4. Curated DTC seed — 6.7 Cummins (EGR + DPF, pre-SCR) (curated) ↩︎