Code 12: Mass Airflow Sensor

NOTE: Use continuity test guide for symbol reference. See Fig 1 .

Test mass airflow sensor, see Fig 2 . See appropriate WIRING DIAGRAMS article. After completing the tests, retest the vehicle to ensure the faults have been rectified. If faults still persist, recheck using Lucas Diagnostic Equipment or Test Book.

Fig 1: Component Identification & Continuity Test Guide

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Fig 2: Mass Airflow Sensor (Test Procedure No. 19)

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