Powertrain, generic (extended)

P2073 Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Idle

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

The engine computer compares the measured air mass, or the manifold pressure, with what the throttle opening and engine speed predict. P2073 means the two disagree in the idle range. Ford's diesel OBD summary 2023 explains its approach: an airflow adaptation factor is learned in an idle cell and a load cell once per drive cycle; if the idle value ends up outside its band, P2073 is set. For the 6.7L Super Duty chassis that band is about +27 % and -13 %; the 3.0L diesel only checks the load cell. Ford bulletin 22-2115 reprograms the PCM of 2011 to 2012 F-Super Duty 6.7L trucks that set P2073 or P2074. Ford's 2014 code list also gives it MIL status. Air leaks, a dirty sensor or a clogged filter are typical; P2074 is the load case.

Likely causes

Unmetered air entering after the air flow sensor (loose clamp, cracked hose, leaking gasket)
Air flow sensor element contaminated or drifted, adaptation runs out of range
Outdated PCM calibration (Ford 6.7L 2011–2012, bulletin 22-2115)
Deposits at the throttle plate distorting the idle air path

Symptoms

  • Check engine light
  • Unsteady or raised idle
  • Often no noticeable driving fault

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–350
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 sensorthrottle position sensorintake manifold

Related codes

P2074P0068P0101P0106P00BC

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