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HELP O2 Sensor with Bad Voltage

 
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Old 11-01-2011, 05:38 PM
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Icon5 HELP O2 Sensor with Bad Voltage

Hi everyone,

Beauty, my 1994 VTEC is currently in the shop at a Test and Repair smog place. my NO levels are in the 1000s. Changed the cat and did a tune up and a valve job. They have had the car for almost 2 days now and are not able to figure out why the NO levels are so high. They checked all the Vacuum lines and the EGR system all seems to work. The only problem they have found was the O2 Sensor is outputting the wrong voltage. This is sending the wrong signal to the ECU which they believe is causing the system to not work in a closed loop. They can not figure out why it is having this issue. They replaced the O2 Sensor with a new one and the same voltage issue is showing. They are kinda stumped.

Any suggestions would be great.

Thanks
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Old 11-07-2011, 11:49 PM
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Re: HELP O2 Sensor with Bad Voltage

Since the EGR system works 100% manually and there are no wire issues that are visible, I get to have my ECU repaired since I can't find a rebuilt one.
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