STFT verses 02 Volts
Thread Starter
TECH Junkie
Joined: Jan 2003
Posts: 3,427
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From: Fresno/Chico
STFT verses 02 Volts I installed my autometer O2 gauge last night and when I tested it verses my scan tool the gauge appears to be reading STFT. It was my understanding that the 02 gauge was sort of a volt gauge reading the millivolts the 02 sensor puts out? Right? If this is true then why/how is the gauge reading matching my STFT?
P.S. my 02 volts are at .6xx during normal driving. I dont want to test nitrous until I better understand my STFT verses 02 Volts dilemma.
P.S. my 02 volts are at .6xx during normal driving. I dont want to test nitrous until I better understand my STFT verses 02 Volts dilemma.
TECH Addict
Joined: Nov 2001
Posts: 2,551
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From: St Louis, MO
Your O2 gauge is slow. Normal driving you should see it swing across .450mV. Put a digital voltmeter on it.
Its impossible for it to read STFT, it'll be similar but STFT is a value that only exists in the software running on the pcm.
Its impossible for it to read STFT, it'll be similar but STFT is a value that only exists in the software running on the pcm.
