P1133 Possible Causes
- 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
How do I fix code P1133?
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.Cost of diagnosing the P1133 code
Labor: 1.0
The cost of diagnosing the P1133 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1133 Meaning
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.P1133 More Information
Need more information on how to fix the P1133 code?Get Access to Factory Service Manuals
Information for specific makes
- P1133 ACURA HO2S Insufficient Switching Sensor 1
- P1133 AUDI HO2S Heater Circuit- Bank 1 & 2 Sensor 1 Electrical Malfunction
- P1133 BUICK HO2S Insufficient Switching Bank 1 Sensor 1
- P1133 CADILLAC HO2S Insufficient Switching Bank 1 Sensor 1
- P1133 CHEVROLET HO2S Insufficient Switching Bank 1 Sensor 1
- P1133 DODGE ECT Sensor Circuit Interm Low Voltage
- P1133 FORD Bank 1 Fuel Control Shifted Lean
- P1133 GMC HO2S Insufficient Switching Bank 1 Sensor 1
- P1133 HONDA HO2S Insufficient Switching Sensor 1
- P1133 ISUZU H02S Insufficient Switching Bank 1 Sensor 1
- P1133 LEXUS Air/Fuel Ratio Sensor Circuit Response Malfunction Bank 1 Sensor 1
- P1133 LINCOLN Bank 1 Fuel Control Shifted Lean
- P1133 MAZDA Bank 1 Fuel Control Shifted Lean
- P1133 MERCURY Bank 1 Fuel Control Shifted Lean
- P1133 PONTIAC HO2S Insufficient Switching Bank 1 Sensor 1
- P1133 SATURN HO2S Insufficient Switching Bank 1 Sensor 1
- P1133 SCION Air/Fuel Ratio Sensor Circuit Response Malfunction Bank 1 Sensor 1
- P1133 SUBARU Front Oxygen Sensor Heater Circuit High Input
- P1133 SUZUKI HO2S11 Too Few Transitions
- P1133 TOYOTA Air/Fuel Ratio Sensor Circuit Response Malfunction Bank 1 Sensor 1
- P1133 VOLKSWAGEN HO2S Heater Circuit- Bank 1 & 2 Sensor 1 Electrical Malfunction