P1133 CHEVROLET - HO2S Insufficient Switching Bank 1 Sensor 1
Repair Importance Level:
Repair Difficulty Level:
- 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 find an automotive repair shop near you to help you
with yout repair
Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P1133 Chevrolet code? Have you replaced any parts?
Any information is appreciated. Thanks