LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2016 >> Focus S, Automatic DCT Trans, Gas >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid) >> Diagnostic Trouble Code (DTC) Charts And Descriptions >> P1121 - Throttle Position Sensor A Inconsistent With MAF/Map Sensor
April 5, 2026: LEMON Manuals is launched! Read the announcement.

P1121 - Throttle Position Sensor A Inconsistent With MAF/Map Sensor

DTC DESCRIPTION P1121 - THROTTLE POSITION SENSOR A INCONSISTENT WITH MAF/MAP SENSOR

Description:  This DTC sets when the PCM detects an air leak that exceeds a calibrated limit for greater than 5 seconds. If the airflow entering the engine exceeds the airflow through the throttle, a leak is detected and this diagnostic fails.
Possible Causes: 
  • Unmetered air leaks between throttle body and intake valves
  • Air leaks at the intake manifold
  • Positive crankcase ventilation (PCV) system is leaking
Diagnostic Aids:  Verify the integrity of the PCV system. Refer to POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM for system information.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test HG .
scientia non olet · About LEMON Manuals