Quote:
Originally Posted by B-R-Z
Moving the sensor(s) can void warranty items related to exhaust issues..?
A tune, if discovered, can probably void everything.
Plus, I'm not spending $500 to eliminate a cel. Not interested in few HP gained in the process.
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Nothing voids a warranty completely. Any modification that isn't OEM can result in a warranty claim denial. The dealer can't deny a warranty for your air conditioner going bad if you have an ECU tune or an aftermarket header. To that effect, a tune does not void everything.
Messing around with the federally mandated emissions system, on the other hand, opens up the door for the dealer to give you a whole lot of headaches related to engine or exhaust. This isn't necessarily just from moving the sensor, merely installing an aftermarket header has already brought you down that path - you messed with the emissions system already, anything else at this point is academic.
Your dealer won't discover a tune. Subaru/Toyota, on the other hand, yeah they can, but you'd have to give them a pretty good reason to be doing that forensic work on the ECU to be looking for it, and anything that gives them reason to be doing that work would have already given them reason to look at your aftermarket header and tampering of the emissions system to call you out on that - the ECU tune is irrelevant at that point as you've already given them plenty of reason to deny warranty work.
If you don't want to spend any money, and you want to be in a position where you can put the system back to stock for warranty work, just ignore the CEL if you get it. Anything else that you're talking about doing will perform just as much warranty damage as the tune, and doing so in a very visible way.
On the other hand, if you really don't care about the warranty, then yeah - go for relocating the sensors. I suspect you'll be fine, but as sensitive as this car is to messing with the sensors, it's anybody's guess until you do it. Be sure to give us an update on how it works out. Good luck!