AutoCodes – Ford – P0151 Ford

P0151 Ford Code - O2 Sensor Circuit Low Voltage Bank 2 Sensor 1

Quick Answer

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. Common causes include Faulty Front Heated Oxygen Sensor Bank 2, Front Heated Oxygen Sensor Bank 2 harness is open or shorted, Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0151 Ford indicates O2 Sensor Circuit Low Voltage Bank 2 Sensor 1.
Common causes: Common causes include Faulty Front Heated Oxygen Sensor Bank 2, Front Heated Oxygen Sensor Bank 2 harness is open or shorted, Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 42,583

How popular is this code, among other codes? Medium

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0151 Ford Description

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

OBDII Code P0151 Ford - O2 Sensor Circuit Low Voltage Bank 2 Sensor 1 - AutoCodes.com — P0151 Ford Code - O2 Sensor Circuit Low Voltage Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0151 Ford?

Faulty Front Heated Oxygen Sensor Bank 2
Front Heated Oxygen Sensor Bank 2 harness is open or shorted
Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Exhaust gas leaks

How to Fix the DTC P0151 Ford?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

Replacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0151 Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0151 Ford code?

Need more information on how to fix the P0151 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0151 Ford code diagnosed by a professional: Find a repair shop in your area

Information for Specific Ford Models

P0151 1997 Ford F150 — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 1998 Ford F150 — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 1999 Ford F150 — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 2000 Ford F150 — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 2001 Ford F150 — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 2002 Ford F150 — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 2003 Ford F150 — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 2006 Ford Fusion — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 2007 Ford Fusion — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 2008 Ford Fusion — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 2009 Ford Fusion — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 2010 Ford Fusion — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 2011 Ford Fusion — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
P0151 2012 Ford Mustang — O2 Sensor Circuit Low Voltage Bank 2 Sensor 1

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0151 Ford Code

1. What are the common symptoms of OBDII code P0151 in a Ford vehicle?

- Common symptoms of code P0151 include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine Light.

2. What does the OBDII code P0151 for a Ford vehicle mean?

- OBDII code P0151 indicates that the O2 sensor circuit for Bank 2 Sensor 1 is experiencing low voltage, possibly due to a malfunction in the oxygen sensor or related components.

3. What are the possible causes of O2 sensor circuit low voltage for Bank 2 Sensor 1 in a Ford vehicle?

- Possible causes of code P0151 include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, vacuum leaks, or issues with the engine's air-fuel ratio.

4. How can I diagnose the O2 sensor circuit low voltage issue for Bank 2 Sensor 1 in my Ford?

- To diagnose code P0151, you can use an OBDII scanner to read the code and data from the oxygen sensor. Additionally, visually inspect the sensor and its wiring for any signs of damage.

5. What are some repair tips for fixing OBDII code P0151 in a Ford vehicle?

- Repairing code P0151 may involve replacing the Bank 2 Sensor 1 oxygen sensor, repairing or replacing damaged wiring, fixing any exhaust or vacuum leaks, and ensuring proper connection of all components.

6. Can driving with a P0151 trouble code cause further damage to my Ford vehicle?

- Continuing to drive with code P0151 may lead to decreased fuel efficiency, engine performance issues, and potential damage to the catalytic converter over time. It is recommended to address the issue promptly.

7. How much does it typically cost to repair OBDII code P0151 in a Ford vehicle?

- The cost of repairing code P0151 can vary depending on the cause of the issue, the labor rates in your area, and whether you choose to do the repairs yourself or take your vehicle to a professional mechanic. Costs may range from $100 to $500 or more.

8. Is it safe to reset the Check Engine Light after fixing OBDII code P0151 in my Ford?

- After repairing code P0151, it is safe to reset the Check Engine Light using an OBDII scanner. This will clear the code and allow you to monitor if the issue has been successfully resolved.

9. How often should the O2 sensors be replaced in a Ford vehicle to prevent OBDII code P0151?

- O2 sensors typically have a lifespan of 50,000 to 100,000 miles, but it is recommended to follow the manufacturer's maintenance schedule for your specific Ford vehicle to prevent issues like code P0151.

10. Can a DIY enthusiast with basic automotive skills repair OBDII code P0151 in a Ford vehicle?

- Depending on the cause of code P0151, a DIY enthusiast with basic automotive skills may be able to repair the issue by replacing the oxygen sensor or fixing wiring problems. However, more complex issues may require professional assistance.