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.
Medium severity. Can I keep driving?You can drive in moderation. If the engine goes into limp mode, go to a repair shop without passing other vehicles or demanding power.
Symptoms
- Check engine light
- Reduced power or limited performance mode (Hyundai)
- Hesitation under acceleration
Most 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
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It can trigger limp mode.
- It affects emissions.
What each character of P2074 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 0: Subsystem depends on the code range
- 74: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2074?
You can drive in moderation. If the engine goes into limp mode, go to a repair shop without passing other vehicles or demanding power.
What causes code P2074?
The most common causes are: 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).
Related codes
- P2073Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Idle
- P0068MAP/MAF - Throttle Position Correlation
- P0101Mass or Volume Air Flow Sensor A Circuit Range/Performance
- P00BDMass or Volume Air Flow A Circuit Range/Performance - Air Flow Too High
- P0170Fuel Trim Bank 1
Sources
- fordservicecontent.com: obd summary diesel 2023
- static.nhtsa.gov: MC 10148731 9999
- static.nhtsa.gov: MC 10155552 9999
- static.nhtsa.gov: MC 10206359 0001
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.