P226CTurbocharger Boost Control A Slow Response
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P226C means the boost control actuator of turbocharger A does move, but too slowly, so boost lags behind changes in demand. Ford's 2023 diesel summary runs an intrusive check on the 3.0 L and 1.5 L at idle, once in each drive cycle: the variable vanes travel from closed to open, and within 7 s manifold pressure must change by at least 6.5 kPa at sea level (3.5 kPa at 8,000 ft). Mitsubishi's 2022 Eclipse Cross 1.5 turbo sets it when the wastegate angle stays more than 20 % off target for 5 s and then limits torque. FCA changed P226C on the 2014 Ram 6.7 L Cummins so that the MIL needs two trips instead of one; FCA case S2018000009 (Jeep) blames varnish in the VGT housing, Nissan NTB20-071 (Titan XD 5.0 diesel) a binding turbine control valve. P226F is the B side.
- What you may notice
- Hesitant pull from low engine speed, turbo lag
- MIL on, sometimes with a torque limit
- More smoke on acceleration with diesel engines
- Likely causes
- LikelyVariable vanes or turbine control valve sluggish from soot, varnish or corrosion
- PossibleWorn electric or pneumatic boost actuator, or a weak control solenoid
- PossibleDamaged wiring or connector between actuator and control module
- RareControl module software that needs an update (cold-weather false sets)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.