Code 18: Throttle Position Sensor Input High/Mass Airflow Sensor Low

Test the throttle position sensor and mass air flow sensor. See Fig 1 and Fig 2 . After completing the tests, retest the vehicle to ensure the faults have been rectified. If faults still persist, recheck using Lucas diagnostic equipment.

Fig 1: Test "H" (1 Of 2)

Courtesy of LAND ROVER NORTH AMERICA, INC.

Fig 2: Test "H" (2 Of 2)

Courtesy of LAND ROVER NORTH AMERICA, INC.