Measuring O2 sensor voltage...
 

I have a 1-wire O2 sensor im trying to check. I know that volt range is between .1-.9 volts. What I need to know is how do I hook up a volt-meter to check it???

Re: Measuring O2 sensor voltage... (See Are X)
 

get a volt meter (digital) and hook the black lead upto hte chassis or engine block and attach the red lead to the wire coming off the sensor...

t..

Re: Measuring O2 sensor voltage... (See Are X)
 

voltage should be between 0.4xx - 0.6xx at idle
a little below 0.500 is perfect.

Re: Measuring O2 sensor voltage... (Quick 200k Mile Motor)
 

ok thanks!

Re: Measuring O2 sensor voltage... (Quick 200k Mile Motor)
 

um, in closed loop?!?!?

i think not,

the voltage should swing from rich to lean at idle once the ECU is in closed loop.

with the AVERAGE voltage being around 0.5v

t..

Re: Measuring O2 sensor voltage... (See Are X)
 

Directly from the manual. "Warm engine to operating tempature. Unplug O2 sensor. Hook + lead to O2 and - lead to body ground. Hold engine at 4000 RPM for 30 seconds. Voltage should be .6v. Allow engine to idle. Voltage should have dropped below .4v when returning to idle."

Re: Measuring O2 sensor voltage... (HidPerf)
 

ive been runnig the o2 code since ive gotten my zc...ive tried everything to fix it..

anywayz my sensor reads .6v at 4k rpm but it takes like 2 minutes to go back down to like .49v

i think this is why im throwing the code...can someone tell my wats goin on..

Re: Measuring O2 sensor voltage... (zcivic91)
 

Ok...I grounded the - probe, and put the + probe on the O2 Sensor wire...started up the car, waited a while, and nothings moving on the voltmeter...any ideas?

Re: Measuring O2 sensor voltage... (See Are X)
 

are you using a digital volt meter?

have you waited 10 minutes for the O2 sensor to heat up to operating temprature?

t..

Re: Measuring O2 sensor voltage... (tinkerbell)
 

Re: Measuring O2 sensor voltage... (tinkerbell)
 

Do I have to use a digital volt meter?

Re: Measuring O2 sensor voltage... (See Are X)
 

yes you do.

t..

Re: Measuring O2 sensor voltage... (tinkerbell)
 

damn, I bought a analog one for nothing then...