P0151
O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 is an OBD-II diagnostic trouble code meaning: O2 Sensor Circuit Low Voltage Bank 2 Sensor 1. Common causes: faulty oxygen sensor, open or short circuit in wiring harness. Estimated repair cost: $56–167.
Symptoms
- Increased fuel consumption
- Unstable idle
- Loss of engine power
- Check Engine Light Is On
Causes
- Faulty oxygen sensor
- Open or short circuit in wiring harness
- Corrosion or poor contact in the sensor connector
- Sensor circuit grounding problem
- ECU malfunction
How to Fix
- Check the integrity of the sensor wiring harness
- Check the sensor connector for corrosion
- Replace the oxygen sensor if necessary
- Check the voltage in the sensor circuit with a multimeter
- Reset the error and check for its reappearance
Related codes
Error P0151 by Vehicle Brand
FAQ
What does the P0151 code mean?
P0151 is an OBD-II diagnostic trouble code that indicates: O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
What causes a P0151 error code?
The most common causes of P0151 include: Faulty oxygen sensor; Open or short circuit in wiring harness; Corrosion or poor contact in the sensor connector; Sensor circuit grounding problem.
How do I fix a P0151 diagnostic trouble code?
To fix P0151: Check the integrity of the sensor wiring harness. Check the sensor connector for corrosion. Replace the oxygen sensor if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0151?
Limited driving only, diagnose soon
How much does it cost to fix P0151?
The estimated repair cost for P0151 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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