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Re: I would start with getting the fault code read. Posted by JimBlake [Email] (#141) [Profile/Gallery] (more from JimBlake) on Tue, 9 Aug 2005 09:18:58 In Reply to: Re: I would start with getting the fault code read., mary, Tue, 9 Aug 2005 06:17:13 Members do not see ads below this line. - Help Keep This Site Online - Signup |
The old-school way to check the sensor is with an analog voltmeter. If you can get a probe on the signal wire while it's connected & running...
While the engine's running the O2 sensor is supposed to be swinging back & forth from 0.1 to 0.9 volts or somewhere like that. The 'normal' way for the sensor to fail is that it gets sluggish. Say it's supposed to swing several times per second, you can see the meter needle trying to swing back & forth. With a digital meter it's hard to see that. If it swings slowly, get a new one. I think 1 or 2 swings per second is too slow.
But first, check out the wiring for the sensor. Look for loose/dirty/corroded connections. The ECU can't tell the difference between a broken wire vs. a broken sensor.
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