Notifications
Clear all
0
14/06/2021 7:30 pm
Topic starter
Hi I have a 2001 Chevy silverado with 250,000 miles with a 4.8 liter engine. The p1133 code has been on. I replaced the o2 sensor and replaced exhaust gaskets. Any ideas?
FYI, Error Code P1133 is defined as HO2S Insufficient Switching Bank 1 Sensor 1
2 Answers
1
14/06/2021 8:46 pm
You either have a bad sensor, a wiring problem, a bad connection or a vacuum leak somewhere.
1
14/06/2021 9:48 pm
or the cat is stuffed
