OBD code P0133 indicates a slow response from the Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 in the exhaust system.
Symptoms include the Engine Light ON, high fuel consumption, and excessive exhaust smoke.
Causes can be a faulty sensor, wiring issues, fuel system problems, or exhaust leaks.
This issue should be addressed promptly to prevent further damage.
A possible fix involves inspecting and repairing the sensor, wiring, and related components.
| Repair Importance Level | 6.67 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 6.67 (Out of 10) |
Symptoms of the p0133 OBD Code
The vehicle may experience a lack of activity from the oxygen sensor bank 1 sensor 1.
- With OBD code P0133, the Engine Light will be ON.
- High Fuel Consumption can be noticed.
- Excessive Smoke from Exhaust may be present.
Causes of the p0133 OBD Code
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P0133 code typically indicates a slow response from the oxygen sensor located before the catalytic converter.
- P0133 can be caused by a faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1.
- A Heated Oxygen Sensor Bank 1 Sensor 1 harness that is open or shorted.
- A Heated Oxygen Sensor Bank 1 Sensor 1 circuit with a poor electrical connection.
- Low or high fuel system pressure.
- Fuel contamination.
- Faulty fuel injectors.
- Exhaust gas leaks.
- Engine vacuum leaks.
Fixing Error Code p0133 Step By Step
Replace faulty oxygen sensor in bank 1 sensor 1 to address P0133 fault code.
- To fix OBDII code P0133, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, if the wiring and connectors appear to be in good condition, consider replacing the oxygen sensor (Bank 1 Sensor 1) as it may be faulty and causing the issue.
- After replacing the sensor, clear the fault codes and test drive the vehicle to verify if the P0133 code returns.
- If the code persists, further diagnostics may be necessary to check for any underlying issues with the engine or exhaust system.
Cost Of Fixing p0133 Fault Code
Diagnosing and repairing fault code P0133 typically involves testing and replacing the oxygen sensor.
The cost to diagnose and fix OBD code P0133 typically ranges from $75 to $150, based on a 1. 0hour repair time.
Factors like shop rates and the complexity of the repair can influence the final cost.
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Details of the p0133 OBD Code
P0133 indicates a slow response from the oxygen sensor located in bank 1 sensor 1.
OBD code P0133 means that the O2 sensor circuit slow response (Bank 1 Sensor 1).
This code is triggered by the Engine Control Module (ECM) when the oxygen sensor located in the exhaust manifold before the catalytic converter takes too long to respond to changes in the airfuel mixture.
This sensor is involved in monitoring the oxygen content in the exhaust gases to help the ECM adjust the fuel mixture for optimal combustion.
Mechanic’s Tech Notes
Diagnostic notes for fault code P0133: Oxygen sensor circuit slow response (Bank 1 Sensor 1).
To diagnose and fix OBDII code P0133, which indicates a slow response from the upstream oxygen sensor (Bank 1 Sensor 1), start by checking the sensor’s wiring harness and connectors for any damage or corrosion.
Use a voltmeter to test the sensor’s voltage output while the engine is running to ensure it is within specifications (around 0. 1 to 0. 9 volts).
If the voltage is not changing rapidly, the sensor may need to be replaced.
Additionally, using a scan tool, monitor the sensor’s response time to changes in airfuel mixture.
If the response is slow, replacing the oxygen sensor is likely necessary to resolve the P0133 fault code.
FAQ
OBD code P0133 means Oxygen Sensor Circuit Slow Response (Bank 1, Sensor 1). Check HO2S Bank 1 Sensor 1 for faults, wiring issues, fuel system problems. Inspect and repair as needed.
Symptoms of P0133: Engine Light ON, High Fuel Consumption, Excessive Smoke from Exhaust. Causes: Faulty HO2S Bank 1 Sensor 1, wiring issues, fuel system problems. Fix: Inspect and repair related components.
Diagnose P0133 by checking HO2S Bank 1 Sensor 1 and related components for faults. Inspect wiring, connectors, fuel system, and exhaust for issues.
Wrap Up
If your check engine light is on and you’re experiencing poor fuel economy with OBDII code P0133, it may be caused by a faulty oxygen sensor, wiring issues, or a vacuum leak affecting the airfuel mixture.
To address P0133, check the oxygen sensor’s wiring and connectors for any damage or corrosion.
Test the sensor’s performance using a scan tool and replace it if necessary.
Ensure there are no exhaust leaks affecting sensor readings.
