Diesel Trouble Codes

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…

Updated October 15, 2026

What it means

Actual boost does not track desired boost over a range of conditions.1

Most likely causes

  1. VGT vane sticking from soot — VGT mechanism sticks, causing boost to deviate from target.1
  2. Turbo actuator fault / calibration out of range — Actuator position error, or learned travel outside the allowable range.12
  3. Boost / MAP sensor error — Sensor reports incorrect pressure, causing the PCM to see a mismatch.1
  4. Intercooler / boost boot leaks — Leaks reduce measured boost below commanded.1
  5. Underboost from VGT vanes stuck open or charge-air leaks — Boost sits below the minimum expected, typically from charge-air-cooler boot leaks, VGT vanes stuck open, a sticking turbo actuator, or a restricted air filter.3
  6. Overboost from VGT vanes stuck closed — Boost climbs above the maximum allowed, typically from VGT vanes stuck closed, an actuator calibration fault, or a boost-sensor error.4

How to diagnose

  1. Verify freeze-frame conditions and confirm P2263 is active with matching desired vs actual boost data.
  2. Inspect intake tract for leaks: intercooler boots, clamps, and CAC connections. Typical on this platform: intercooler/boot leaks; Charge-air-cooler boot leaks.
  3. Check air filter restriction and intake integrity. Typical on this platform: restricted air filter; intake restriction or unmetered air leak upstream of sensor.
  4. Monitor MAP/boost sensor readings at idle and under load and compare to a known-good reference. Typical on this platform: MAP/boost sensor error; boost-sensor error.
  5. Command VGT vane position with scan tool and observe actual vs desired; check for sticking or slow response. Typical on this platform: VGT vane sticking from soot; VGT vanes stuck closed; VGT vanes stuck open.
  6. Check turbo actuator learned position and perform relearn if supported. Turbo actuator’s learned travel is outside allowable range; Sticking VGT mechanism or worn/failed actuator.

Common mistake to avoid

Replacing the turbo before smoke-testing the intake. Boost leaks at intercooler boots, end tanks and clamps are a common cause of low power and underboost codes, and they mimic a failing turbo. Source: BD Diesel — 6.7L Power Stroke problems and real fixes.

Parts and tools you may need

Tools you’ll need

Rough cost and difficulty

Likely repairPartsShop laborWho usually does it
ECM/PCM software update—0.5–1.5 hrsShop
MAP/boost pressure sensor$40–$2000.3–1 hrsEasy DIY
Intercooler boot, clamp or pipe repair$20–$2000.5–2 hrsEasy DIY
Electronic VGT actuator$400–$9001–3 hrsDIY with tools and a manual

Typical US independent-shop figures; labor runs about $120–$180 per hour (dealers charge more). Confirm the diagnosis before buying parts.

When to see a pro

If VGT mechanism is seized, actuator requires replacement, or turbocharger replacement is indicated, have a qualified diesel technician perform the work. Do not service high-pressure fuel or safety-critical systems without proper training.

Check for recalls

Recalls are tied to your truck’s VIN, so check yours directly: enter the VIN at NHTSA’s recall lookup. Open safety recalls are repaired free at a dealer.

Sources

  1. Curated DTC seed — 6.7 Powerstroke (curated) ↩︎ ↩︎ ↩︎ ↩︎ ↩︎

  2. Curated DTC seed — 6.7 Powerstroke (curated) ↩︎

  3. Curated DTC seed — 6.7 Powerstroke (curated) ↩︎

  4. Curated DTC seed — 6.7 Powerstroke (curated) ↩︎