Powertrain, generic (extended)

P2074 Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Higher Load

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

Likely causes

Clogged air filter shifting the learned airflow value (Ford 6.7L)
Leak in charge air pipes or intercooler on turbo engines
Calibration issue fixed by software update (Ford 6.7L, Hyundai 2.5L)
Air flow sensor reading drifted at high flow rates

Symptoms

  • Check engine light
  • Reduced power or limited performance mode (Hyundai)
  • Hesitation under acceleration

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–400
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

manifold absolute pressure sensormass air flow sensorcharge air pipeintake air filter

Related codes

P2073P0068P0101P00BDP0170

References: fordservicecontent.com, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.