BMW M3 Forum (E90 E92) - View Single Post - Increased emissions becuase of exhaust leak?

signes · 12-03-2012, 07:59 PM

A leak would generate a CEL, but you should get it fixed regardless. Where is it? You have both the primary and secondary stock cats still on? You could also have a faulty O2 sensor among about 1000 other reasons.

12-03-2012, 07:59 PM	#2
signes Brigadier General Drives: E90 M3 Join Date: Sep 2008 Location: Spinnin at 8k Posts: 3,251 iTrader: (3)	A leak would generate a CEL, but you should get it fixed regardless. Where is it? You have both the primary and secondary stock cats still on? You could also have a faulty O2 sensor among about 1000 other reasons. __________________ 08 E90 \| Jet Black / Black \| 6MT Mods: RAC RG63 w/ Pirelli Corsa 255F/285R \| Akrapovic Evo Exhaust \| OEM Blacklines Winter Setup: OEM 18s w/ Nokian Hakkapeliita R 245/40-18