Jaguar XF 3.0D 2010 - Air Mass fault, restricted performance - Fixed #
Posted by Sean Savage on April 15, 2014, 12:27 pm
Year of Manufacture *: 2010|
Engine Size and Code *: 3000 twin turbo diesel
This came in for "restricted performance light on dash" fault codes were air mass sensor circuit "a" flow too high. and one related to barometric pressure and boost pressure sensor "a" performance below required limit. Fault codes would clear but when driving under partial load limp home mode would return. the air mass meters were reading totally different from each other.. one 1002gm other 35gm so i replace the lower sensor "a" air mass meter. fault the same. on further investigation with intake pipes open one was sucking but the other was blowing! i eventually traced the fault to a "balance control valve" at the bottom front of the engine £450+vat but the lever which is same as a turbo wastegate was seized open, 10 minutes of working and spraying and the car drives perfect.