P2074Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Higher Load
- 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
- Same plausibility idea as P2073, but evaluated above idle, where the measured air mass or manifold pressure must match what throttle opening and rpm predict under load. Ford's diesels learn an airflow adaptation in a load cell; outside roughly +/-20 % (6.7L chassis and 3.0L), or if no stable value is learned within 20 learning events, P2074 is stored. Several Ford documents deal with it on the 6.7L Super Duty: a dirty air filter plus a MAF parameter reset instead of new parts (2013-2019 trucks), new calibration for 2017-2019 builds up to 9 January 2019, often with P0170. Hyundai bulletin 21-01-075H covers 2.5L Sonata, Santa Fe and Tucson (2020-22) with P2074 variants for low and for medium/high load, cured by ECM software; reduced power is possible.
- What you may notice
- Check engine light
- Reduced power or limited performance mode (Hyundai)
- Hesitation under acceleration
- Likely causes
- LikelyClogged air filter shifting the learned airflow value (Ford 6.7L)
- LikelyLeak in charge air pipes or intercooler on turbo engines
- PossibleCalibration issue fixed by software update (Ford 6.7L, Hyundai 2.5L)
- PossibleAir flow sensor reading drifted at high flow rates
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.