Increased Emissions

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Jan 15, 2010 | 08:14 AM

Diezelpower

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From: Norway

My Ride: 03/2005mod 535d E61 *Chipped* 350bhp/700NM *KN Air filter *Hamann Style Front Lip *Hamann Style Diffuser *M5 look carbon mirrors *6000k Xenon Kit *6000k Angel Eyes *20" Rims *Black Kidneys *Quad Exhaust *Drilled and slotted brake rotors *EBC Yellowstuff Brakepads - Active Steering, Panorama Sunroof, Sport Seats, M-Package, Anthracite Roof Liner, M-Pedals, M-sport suspension, M-Sport Steering Wheel, Auto Leveling, Navi Pro, CD-Changer, Aux Input, M-Sport Door Sills, Iso-Fix (I have two children). I will post pictures later on... Bought the car 21st of Septermber and went abroad to work on the 23rd of September... Will try to get some decent pictures...

Hi Guys!

I've just purchased carsoft ultimate v8.0 with obd-2 cables.

Diagnosed my car when I had the "Increased Emissions" engine block symbol on my dash.
Got the following code:

Fault Code : F4501

4501 Exhaust gas feeback regulation

Fault Code : F4166

Can anyone help me with this?
I've had the intake off and installed the swirl flaps delete kit, cleaned the EGR valve, replaced a defective EGR thermostat.

I have: KN filter for filterbox, Chip, quad exhaust.

Wondering if this could be a defective MAF, lambda or wrong back pressure because of quad exhaust.

Please help!!

I don't want to contact the STEALER because of this. Gonna cost me $$$.

Jan 23, 2010 | 06:19 PM

pauliehcfr

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there should be some vacuum hoses associated with the valve you replaced. most of the time the vacuum hoses develops cracks in it which allow excessive outside air into the system which will set a code. check all the vacuum hoses for dryrot/cracking and replace as needed.