Emissions light after cat delete

[moondog01]

Need help with orange emissions light on dash which has come on after cutting out rear cats and exhaust work. Local garage (not Audi) deleted light but it came on again. They suggested soldering a resistor between appropriate wires on O2 sensors to fool computer into thinking emissions OK. Anyone tried this? Or any other suggestions welcome.

The Flying Kiwi.

[Dinosroume]

Need help with orange emissions light on dash which has come on after cutting out rear cats and exhaust work. Local garage (not Audi) deleted light but it came on again. They suggested soldering a resistor between appropriate wires on O2 sensors to fool computer into thinking emissions OK. Anyone tried this? Or any other suggestions welcome.

The Flying Kiwi.

Just get a stage 2 remap to fool the rear O2 sensors.
I'm planning go decat in my rs4 with an H or X pipe and stock rear backboxes and REVO stage 2.
You need to delete the rear lambdas or a software that avoids rear lambdas (stage 2 remap)

Dinos

[Rick_RS4]

Get 2 lambda bosses that extend the lambda away from the flow. I have the 90 degree ones

[Daytona]

+1 for spacers, I had mine on for ages before I had a remap and the light didn’t come on once.
I’ve still got them if you’re interested?

[moondog01]

Thanks for the help guys. I think I'm going to go with the remap option. Spoke to the tuner, who said they expand the range in the computer to effectively delete the fault and the sensor will then read correct to the cpu. A map will give me the option to improve performance as well and I'll get it on the dyno for the first time.

[James1984]

How long did the light take to show up?

[moondog01]

How long did the light take to show up?

About 50 miles of travel after exhaust work from memory.

[James1984]

How long did the light take to show up?

About 50 miles of travel after exhaust work from memory.

Thanks, I have a full decat and mines still off, only been running for a few days