P1133 Chevrolet - HO2S Insufficient Switching Bank 1 Sensor 1
- Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
- Vacuum leak
- Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 harness is open or shorted
- Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 circuit poor electrical connection
When is the code detected?
If the Powertrain Control Module (PCM) determines that the front HO2S did not switch enough times, the PCM will set the P1133 code.
- Engine Light ON (or Service Engine Soon Warning Light)
P1133 Chevrolet Description
The Powertrain Control Module (PCM) monitors the Heated Oxygen Sensor (HO2S) activity for 90 seconds after closed loop operation has begun. The PCM determines if the front HO2S is functioning properly by counting the number of HO2S-1 Lean/Rich (L/R) and Rich/Lean (R/L) switches.
Need more help?
Do you need more help with the P1133 Chevrolet code? ask a question to our users or search the top hand picked automotive forums for more information
CHEVROLET Technical Service Bulletins for P1133 code
2007 CHEVROLET COBALT Fuel System, Gasoline:delivery:fuel Pump Details
2007 CHEVROLET COBALT 072100 Fuel System, Gasoline:delivery:fuel Pump Details
2007 CHEVROLET COBALT Engine And Engine Cooling:engine Details
2007 CHEVROLET COBALT 061000 Engine And Engine Cooling:engine Details
Repair Shops Around Your Area
Need parts to fix this code? Search hundreds of stores at the same time and compare prices
Help us improve Engine-Codes.com. Leave a comment below or tell us if the information above help you fix the code. What are symptoms is your vehicle for the P1133 Chevrolet code? Have you replaced any parts?
Any information is appreciated. Thanks