📖 What Does P0151 Mean?
The upstream oxygen sensor on bank 2 is reading consistently low voltage.
Symptoms
Lean running on bank 2, poor fuel economy, rough idle, check engine light.
Common Causes
Faulty oxygen sensor, exhaust leaks before sensor, wiring short to ground, vacuum leaks on bank 2.
Possible Solutions
Replace oxygen sensor, repair exhaust leaks, fix wiring shorts, check for vacuum leaks.
Recommended Parts & Tools
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📦 Parts Needed
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Frequently Asked Questions about P0151
How serious is P0151?
This code has a medium severity level. This should be diagnosed and repaired soon to prevent further issues.
Can I drive with P0151?
You can typically drive short distances, but have it diagnosed as soon as possible.
How much does it cost to fix P0151?
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 P0151
Oxygen Sensor Circuit Malfunction Bank 2 Sensor 1
Oxygen Sensor Circuit High Voltage Bank 2 Sensor 1
Oxygen Sensor Circuit Slow Response Bank 2 Sensor 1
Oxygen Sensor Circuit No Activity 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