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Failed MOT on emissions

Tiny
RACHEL URBACH
  • MEMBER
  • 1999 VAUXHALL ASTRA
  • 4 CYL
  • 2WD
  • MANUAL
  • 185,000 MILES
I have a v reg Vauxhall astra, 1.6l petrol. It has failed MOT on CO emissions and mechanic can't solve problem. He's cleaned the engine. Any suggestions as to why it's failing? Thanks, Rachel
Wednesday, December 15th, 2010 AT 4:09 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
High CO could be caused by the oxygen sensor or the coolant temperature sensor stuck in the open loop mode-not switching
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Wednesday, December 15th, 2010 AT 4:31 PM
Tiny
RACHEL URBACH
  • MEMBER
  • 2 POSTS
Thanks for that. And are those simple things for my mechanic to sort out?
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Wednesday, December 15th, 2010 AT 4:47 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Yes, if he knows his stuffs
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Wednesday, December 15th, 2010 AT 5:04 PM

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