📖 What Does P0133 Mean?
The upstream oxygen sensor on bank 1 is responding too slowly to changes in exhaust oxygen content.
Symptoms
Poor fuel economy, sluggish acceleration, failed emissions test, check engine light.
Common Causes
Aging oxygen sensor, contaminated sensor, exhaust leaks, wiring resistance, poor sensor ground.
Possible Solutions
Replace oxygen sensor, repair exhaust leaks, check wiring and ground connections, clean sensor area.
Recommended Parts & Tools
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📦 Parts Needed
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Frequently Asked Questions about P0133
How serious is P0133?
This code has a medium severity level. This should be diagnosed and repaired soon to prevent further issues.
Can I drive with P0133?
You can typically drive short distances, but have it diagnosed as soon as possible.
How much does it cost to fix P0133?
Repair costs vary depending on the root cause, but typically range from $100-300 including parts and labor.
Related Diagnostic Codes
Other codes that may appear with P0133
Oxygen Sensor Circuit Malfunction Bank 1 Sensor 1
Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 1
Oxygen Sensor Circuit High Voltage Bank 1 Sensor 1
Oxygen Sensor Circuit No Activity Detected Bank 1 Sensor 1
Oxygen Sensor Heater Circuit Malfunction Bank 1 Sensor 1
Catalyst System Efficiency Below Threshold Bank 1
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system