1. R

    5Volts reference putting out 12 volts with key on 18 volts with car on(overcharge)

    I noticed my tps and other sensors like iac and others are giving a 12 volts read on my multimeter with key-on instead of the usual 5 volts it goes as high as 18.5 volts with car on! I'm guessing those ("missing") 5 volts show up eventually when I turn the car on? But wait , how can that be... I...