Vauxhall Signum 2.2 2005 - MOT emission failure, high CO and HC Lamda 0.946 #
Posted by Adrian Wellard on January 28, 2010, 5:38 pm
Message modified by board administrator January 29, 2010, 11:35 am
Year of Manufacture *: 2004
Engine Code or CC *: Z22YH
( Optional ) Scanner Used: ACR4
This car has failed its MOT on a high CO 1.7 ,high hydrocarbon 280 and lamda at 0.946 at fast idle .Have replaced the fuel pressure regulator ,this made a huge differance but it still wont pass on CO -just over limits after a good run and nice and hot .Seems like a catalyst fault but not sure how to prove .No faults stored .Last attempt before it goes to Vauxhall main dealer.
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Vauxhall Signum 2.2 2005 - MOT emission failure, high CO and HC Lamda 0.946 # - Adrian Wellard January 28, 2010, 5:38 pm