📖 What Does P0154 Mean?
The upstream oxygen sensor on bank 2 shows no switching activity.
Symptoms
Poor fuel control on bank 2, rough idle, failed emissions test, check engine light.
Common Causes
Failed oxygen sensor, open wiring, no power to sensor, contaminated sensor.
Possible Solutions
Replace oxygen sensor, repair open circuits, check power supply, clean sensor area.
Recommended Parts & Tools
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📦 Parts Needed
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Frequently Asked Questions about P0154
How serious is P0154?
This code has a medium severity level. This should be diagnosed and repaired soon to prevent further issues.
Can I drive with P0154?
You can typically drive short distances, but have it diagnosed as soon as possible.
How much does it cost to fix P0154?
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 P0154
Oxygen Sensor Circuit Malfunction Bank 2 Sensor 1
Oxygen Sensor Circuit Low Voltage Bank 2 Sensor 1
Oxygen Sensor Circuit High Voltage Bank 2 Sensor 1
Oxygen Sensor Circuit Slow Response Bank 2 Sensor 1
Oxygen Sensor Heater Circuit Malfunction Bank 2 Sensor 1
Catalyst System Efficiency Below Threshold Bank 2
💡 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