Rep Power: 247

So after numerous IC modifications and some slightly-nonstock tires, my speedometer is inaccurate. But it's not a linear difference, it's about 10%. Meaning, when it's indicating 80 mph, I'm going about 72 mph. I know some of you just deal with it, but I don't like guessing how fast I'm going. The difference gets pretty big when you get up in the numbers.

I know it's possible with OBD-II cars. Anyone know the specifics?

 
Rep Power: 262

I imagine you'd need OEM level scan tool to get into that.

 
Rep Power: 423

Its cheaper to buy a TomTom (which tells you how fast you're going) and stick it on your dash than it is to try and have the gauge recalibrated. Rumor has it its many hundred dollars to have it done.

 
Rep Power: 247

Yeah, I've got a Garmin on my dash that I use when I drive cross-country.

It's just I know for S2K's there's a "yellow box" that you can wire in that costs about $50 thats a hodgepodge of potentiometers and whatnot that lets you calibrate the speedo yourself.

 
Rep Power: 811

i know a place that does it for $150. ill try and find the site if youre interested.

 
Rep Power: 247

If you happen to have it, I'll take it. But I'm researching some other options first. So no rush, is what I'm trying to say.

 
Rep Power: 247

I need to know if the 7th-gen has a hall-type (3-wire) speed sensor. I'm at school, so I really can't go crawl around under the car.

 
Rep Power: 262

wht/grn is signal
blk/yel is ignition power
blk is ground

There's also a two-wire speed sensor @ each wheel for the ABS system.

 
Rep Power: 247

OK thanks, +1 for you.