O2 Sensor

Posted By: 70 buzz

O2 Sensor - 08/10/14 02:30 PM

Scanner said bank one sensor one on my truck. I replaced and it went off but the service engine light came on again after two days and scanned again same sensor. Any ideas what is going on. The truck runs fine but something is setting it off. Thanks

Posted By: DaveRS23

Re: O2 Sensor - 08/10/14 04:34 PM

Remember that the code is for that circuit, not just the sensor. Was the replacement sensor the same brand as the one removed?

It might be a good idea to test the old sensor and the new one to see how their outputs compare.

Posted By: 70 buzz

Re: O2 Sensor - 08/10/14 06:05 PM

Quote:

Scanner said bank one sensor one on my truck. I replaced and it went off but the service engine light came on again after two days and scanned again same sensor. Any ideas what is going on. The truck runs fine but something is setting it off. Thanks

yes the same

Posted By: jbc426

Re: O2 Sensor - 08/10/14 06:34 PM

Pre or post cat?

Posted By: 70 buzz

Re: O2 Sensor - 08/10/14 06:59 PM

Quote:

Pre or post cat?

upstream which would be pre cat