P1133
HO2S Insufficient Switching Sensor 1
P1133 is an OBD-II diagnostic trouble code meaning: HO2S Insufficient Switching Sensor 1. Common causes: oxygen sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.
Symptoms
- Increased fuel consumption
- Unstable engine idling
- Reduced engine power
- Check engine light comes on
- Increased emissions of harmful substances
Causes
- Oxygen sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Air leak in the exhaust system
- Fuel system problems (too rich or lean mixture)
How to Fix
- Check the condition of the oxygen sensor and its connector
- Check the integrity of the wiring to the sensor
- Check the exhaust system for leaks
- Check fuel system operating parameters
- If necessary, replace the oxygen sensor
Related codes
Error P1133 by Vehicle Brand
FAQ
What does the P1133 code mean?
P1133 is an OBD-II diagnostic trouble code that indicates: HO2S Insufficient Switching Sensor 1
What causes a P1133 error code?
The most common causes of P1133 include: Oxygen sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Air leak in the exhaust system.
How do I fix a P1133 diagnostic trouble code?
To fix P1133: Check the condition of the oxygen sensor and its connector. Check the integrity of the wiring to the sensor. Check the exhaust system for leaks. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1133?
Yes, but get it checked soon
How much does it cost to fix P1133?
The estimated repair cost for P1133 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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