C63 AMG (W204) 2008 - 2015

Secondary cat problem?

Old 04-18-2016, 03:30 AM
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Secondary cat problem?

I have just had my secondary cats deleted a few days ago with no issues, however this morning the run flat indicator inoperative light came on and the power steering has gone stiff!! All tyre pressures are fine, so I am slightly confused if this is purely a coincidence as I have never had lights on the car like this before!! Thanks in advance for any help
Old 04-18-2016, 09:04 AM
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Jag F-Type V8
Coincidence.
Old 04-18-2016, 10:16 AM
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2012 c63 AMG, 2011 GLK 350, 2019 GLS 450
Originally Posted by Simon Hurrell
I have just had my secondary cats deleted a few days ago with no issues, however this morning the run flat indicator inoperative light came on and the power steering has gone stiff!! All tyre pressures are fine, so I am slightly confused if this is purely a coincidence as I have never had lights on the car like this before!! Thanks in advance for any help
Def coincidence that would have nothing to do with your exhaust.
Old 04-18-2016, 12:24 PM
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'13 C63 AMG P31
Originally Posted by Simon Hurrell
I have just had my secondary cats deleted a few days ago with no issues, however this morning the run flat indicator inoperative light came on and the power steering has gone stiff!! All tyre pressures are fine, so I am slightly confused if this is purely a coincidence as I have never had lights on the car like this before!! Thanks in advance for any help
Just fill up the tires a couple more psi than normal and it will go away.
Old 04-18-2016, 03:36 PM
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Arent there sensors on the cat?

If you delete the cats, how did you deal with the sensor for not throwing codes?
Old 04-18-2016, 03:52 PM
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Originally Posted by jay rick
Arent there sensors on the cat?

If you delete the cats, how did you deal with the sensor for not throwing codes?
not the secondaries
Old 04-19-2016, 12:21 AM
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my best guess is the break dusts is over powering your speed sensors and cant read your speed. See if you can use cruise control, if not, then you had the same issue as me a while back. Try shooting water (the higher the pressure, the better) into the holes of your rotors and see if a ton of dust comes out and if it resolves your issue. If it does, the long term solution is the jack the car up, remove the speed sensors and clean it w/ alcohol/water.
Old 04-19-2016, 07:23 AM
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Is the car driveable? I had a code like but my power steering was working but the car went to limp mode. An off and start would clear but eventually the code will come back.
It came out to be the pedal sensor.
So unless you can read the code, is gonna be hard to see whats is making throwing the code.
Old 04-19-2016, 10:54 AM
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