Question: New Magnaflow getting P1133 Code, 2000 C5

[trespasser8]

Fellow CAC Boys & Girls, ;help
Just installed new Magnaflow Performance Exhaust including cat and 2 new rear Bosch O2 sensors. I had sims on the rear before. All was well until code P 1133 started coming up. Bank 1, Sensor 1, driver side before cat. The front sensors are old. Can anyone tell or show me the location of this sensor. I also recently added a bottle of Techron due to a sticky fuel guage. The car runs just fine. Any suggestions or ideas for repairing or finding the cause of code P 1133? Thanks and enjoy your Vette this summer!

Chet-Trespasser8

 

[Hib Halverson]

Bank 1, Sensor 1, is screwed into the exhaust, just downstream of the driver side exhaust manifold.

P1113 sets when there is insufficient sensor switches. Sometimes this can be a "lazy" or faulty oxygen sensor and it may be that just replacing that sensor will solve the problem, however, it might not be the sensor. There are a host of wiring issues that may also cause this code to set.

My first advice is to consult the Factory Service Manual for it's troubleshooting instructions. Also, you may need a scan tester or a DMM to solve the code.

Beyond that, you need to check all the wiring, signal, heater, and ground for that sensor. Also, you want to check for an exhaust leak.

Lastly, high oil consumption can cause this code to set.

 

[trespasser8]

Thank You Hib. My first step will be to find the sensor and go from there.