MOT failed on emissions!?!?!? lambda sensor??
hi, i just put my car through its MOT and the car failed on emissions....
the car: has a cat, has been serviced very recently with no faults on the ecu, has had a new MAF sensor recently, when the guy at the garage gave me my keys he said it could either do with a service (obviously no need) or it could be the lambda sensor... can anyone shine any light on the matter for me?? and if possible where i can get one without breaking the bank as i rung up Prosport (subaru specialist) and they want £49 ex vat for 1 hour labour and £90 ex vat for the lambda if it is that........ :wonder: :wonder: :wonder: :wonder: :wonder: :wonder: |
What did it fail on - CO2 or Hydrocarbons? Or was it visible smoke?
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sorry i forgot to add that i have UK turbo 2000 (1999)
and it failed on CO2 i think |
Give these guys a ring
API Engines See if they have a cheaper option for the Lambda sensor, then find the cheapest local garage/exhaust place you can find to fit it for you. It's not a difficult job that needs a specialist. |
If the ECU hasn't been reset since the MAF change, it may need to be - they don't appear to notice if the MAF has been changed & it may be ignoring the reading, which is fairly likely to cause an MOT fail... Might need a new lambda probe anyway as if the fueling's been off because of the dodgy MAF, it could've screwed it. You can easily tell if the ECU wasn't reset after the MAF change as it'll drive quite differently (and typically the idle will improve, unsurprisingly!).
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The lambda sensor screws into the downpipe catalyst and it can be viewed from the top of the engine bay, on the right side of the pipe a few inches below the turbo. To remove it, unplug the connector block, lube up the thread and use a 22mm spanner. It may not want to budge though.Mine trashed the thread on the sensor while removing it.
It's well worth sourcing your own parts and fitting yourself. |
Originally Posted by bob r
(Post 8037718)
The lambda sensor screws into the downpipe catalyst and it can be viewed from the top of the engine bay, on the right side of the pipe a few inches below the turbo. To remove it, unplug the connector block, lube up the thread and use a 22mm spanner. It may not want to budge though.Mine trashed the thread on the sensor while removing it.
It's well worth sourcing your own parts and fitting yourself. |
The ECU will only show if there is a complete failure - it won't notice a misreading sensor. Knowing the reason for the failure is pretty key - here's a 'guide' for working out where the problem is (might save you some cash!):
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Originally Posted by nom
(Post 8038335)
The ECU will only show if there is a complete failure - it won't notice a misreading sensor. Knowing the reason for the failure is pretty key - here's a 'guide' for working out where the problem is (might save you some cash!):
il find out in the weekend when i have time to check things out.. i hope it just the lamda sensor... a cat or a remap could be quite expensive since im looking to sell the car after i get the new MOT.... il post my findings when i know more :) |
Great i found out its just a lambda sensor :)
now i need to order one and fit it :lol1: :lol1: |
lambda sensor in, mot done, car has passed :luxhello: :luxhello: :luxhello: car also for sale again in the generals section :lol1: :lol1:
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Is it any other way to pass CO2 with decat 3" system ? I just fail MOT and i need to find the solution ...
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with a decat u will never pass the mot its either friendly station/sports decat downpipe or cat on mot cat off after mot
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Originally Posted by p1junkie
(Post 8085165)
with a decat u will never pass the mot its either friendly station/sports decat downpipe or cat on mot cat off after mot
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would ^^^^ work? mine has a decat downpipe and i desperately need a cat and a lambda sensor to go in so that it passes! let me know please someoneee!
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