Car has been off the road for just over 3 months ( long story ) but I’ve got the EML light on with fault code P0420 ( catalyst system bank 1 efficiency below threshold ) so it looks like the cat is on its way out and not doing it’s “job” ( was also flagging this up intermittently before being off the road ) is there a sports cat I can do a direct replacement with ( any links appreciated ) as I want to keep the car OEM without any straight through pipe and mapping ? Cheers all - Leo
OEM Cat Replacement
- Thread starter L e o
- Start date
Isn't it more expensive to replace the cat?
I would just cut it out and switch off the Lambda sensor via mapping. Remember that you don't have to do any performance mapping (you want to keep car OEM).
Alternatively installing a mini cat cat fooler is also a choice
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I would just cut it out and switch off the Lambda sensor via mapping. Remember that you don't have to do any performance mapping (you want to keep car OEM).
Alternatively installing a mini cat cat fooler is also a choice
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You would need to have a stage 2 or custom map to fit a sports cat due to the effects of the reduced back pressure. There's not too much difference between a good sports cat e.g. Scorpion and a decat in real terms.
I asked about running a sports cat with my existing stage 1+ map and my tuner said it wouldn't run correctly and could cause damage.
I asked about running a sports cat with my existing stage 1+ map and my tuner said it wouldn't run correctly and could cause damage.
HJS Tuning ECE Downpipes
The HJS tuning ECE Downpipes are specifically designed to be fully road legal within Europe (R103 compliant) while still providing the benefits of the High Flow Sports Cat. HJS ECE Cats do not require engine ECU software upgrades and will not trigger a check engine light, ranging between 200 to...
I would look for a lightly used original replacement it would be the easier option and guaranteed to not cause issues. Check you are not having lambda sensor issues though before replacing the cat.
