Confusing with engine management light

1. HaZz Infrequent Poster Joined: Jun 2009 Gloucestershire Posts: 159 Silver Mk2 VTR

   #1 29th April 2010, 20:55

   My engine management light had been on for a while and the garage had a look at it while they replaced my driveshaft, the machine came back saying it was an old catalytic converter however the light was off... My exhaust recently snapped off right below the cat and i got it welded back on today and on the way home the light pops back on... any thoughts?
2. dankzy Established Member Joined: May 2009 Middlesbrough Posts: 1143 citroen saxo 1.1 forte orange mango :)

   #2 29th April 2010, 21:02

   maybe where it is welded, there is still a hole where the gases are escaping and causing the lamba to set off the light, maybe get a new cat or faulty sensor, will be one of the two
3. HaZz Infrequent Poster Joined: Jun 2009 Gloucestershire Posts: 159 Silver Mk2 VTR

   #3 29th April 2010, 21:06

   how much roughly is it for a new cat?
4. HaZz Infrequent Poster Joined: Jun 2009 Gloucestershire Posts: 159 Silver Mk2 VTR

   #4 29th April 2010, 21:11

   also... even when it was snapped the light wasn't on then... only after they welded it and about an hour later it popped on.
5. Flatarch Regular Poster Joined: Mar 2010 High Wycombe Posts: 363 Silver Mk2

   #5 29th April 2010, 21:15

   Quote:

   Originally Posted by HaZz how much roughly is it for a new cat?

   About £160 fitted mate i'd say
6. dankzy Established Member Joined: May 2009 Middlesbrough Posts: 1143 citroen saxo 1.1 forte orange mango :)

   #6 29th April 2010, 21:43

   maybe the heat from welding damaged the sensor, did he unplug it when welding?
7. HaZz Infrequent Poster Joined: Jun 2009 Gloucestershire Posts: 159 Silver Mk2 VTR

   #7 30th April 2010, 12:18

   I have no idea about if he unplugged it. I may just get it replaced or something in a month or two, is it an MoT fail if the light is on?
8. user_35312 Established Member Joined: Jun 2009 Coventry CV6 Posts: 2477 Slowda Octavia vRS SOLD - Cam'd Chip'd VTR

   #8 30th April 2010, 12:23

   Quote:

   Originally Posted by HaZz I have no idea about if he unplugged it. I may just get it replaced or something in a month or two, is it an MoT fail if the light is on?

   Yea i think so, if its the lambda sensor it will fail on emissions
9. HaZz Infrequent Poster Joined: Jun 2009 Gloucestershire Posts: 159 Silver Mk2 VTR

   #9 30th April 2010, 12:51

   what? if the machine comes up saying its failing on emissions it means the lambda sensor has gone in it?