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

Test Throttle Position (TP) sensor and Mass Airflow (MAF) sensor. Perform Test "H". 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 or Test Book.

Fig 1: Throttle Position Sensor Input High/Mass Airflow Sensor Input Low Fault Test "H" (1 Of 2)

Courtesy of LAND ROVER NORTH AMERICA, INC.

Fig 2: Throttle Position Sensor Input High/Mass Airflow Sensor Input Low Fault Test "H" (2 Of 2)

Courtesy of LAND ROVER NORTH AMERICA, INC.