Important! : Miss-fire

1. jinx Frequent Poster Joined: Jun 2008 Staffordshire Posts: 745 Saxo - Furio 1.4

   #1 6th July 2010, 22:12

   When driving home the engine management light came on,
   
   the engine has started to missfire when accelerating in low revs.
   
   Had it on diagnostics and it came up
   
   Stepper motor
   o2 sensor
   CAT insufficiency
   
   Would i just need a new lambda sensor to cure the problem or is it a new cat?
   
   ANY help is most appreciated
   Thank You
2. BobCm Forum Section Moderator Joined: Apr 2009 Orpington Posts: 1406 My son drives a Poseidon Blue Saxo Mk2 1.6i VTR.

   #2 6th July 2010, 22:13

   Hi,
   
   It could be both. ALso, the stepper motor will not set the engine warning light, but may also be contributing to the problem.
3. jinx Frequent Poster Joined: Jun 2008 Staffordshire Posts: 745 Saxo - Furio 1.4

   #3 7th July 2010, 06:50

   I thourght the stepper motor would throw an error because then the engine miss-fires the revs drop,
   
   Would it be worth trying to clean the o2 sensor or is it a new sensor jobi?
   
   Cheers
4. BobCm Forum Section Moderator Joined: Apr 2009 Orpington Posts: 1406 My son drives a Poseidon Blue Saxo Mk2 1.6i VTR.

   #4 7th July 2010, 18:59

   Hi,
   
   I meant that an ICV fault may trigger an error but it will not be the cause of the engine warning light.
   
   You cannot clean an oxygen sensor.