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Home >> Ford >> 2003 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 2050 (Engine Controls - Diagnostic Subroutines - 6.4L 99R Diesel -- F250-F550 Super Duty) >> Diagnostic Trouble Code (DTC) Charts and Descriptions >> P0103 - Mass Or Volume Air Flow A Circuit High

P0103 - Mass Or Volume Air Flow A Circuit High

WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
P0103 - MASS OR VOLUME AIR FLOW A CIRCUIT HIGH

Description:  The mass air flow (MAF) sensor circuit is monitored by the powertrain control module (PCM) for high air flow (or voltage) input through the comprehensive component monitor (CCM). If during key on, engine off (KOEO), or key on, engine running (KOER), the air flow (or voltage) changes above a maximum calibrated limit, the test fails.
Possible Causes: 
  • MAF circuit shorted to voltage
  • MAF sensor screen is blocked
  • MAF RTN circuit open
  • Water intrusion
  • MAF sensor
Diagnostic Aids:  A MAF_Hz PID (MAF PID) reading greater than 5 kHz during KOER at idle indicates a concern is present.
Application    Key On Engine Off  Key On Engine Running  Continuous Memory 
All   refer to PINPOINT TEST J .