AutoCodes – Chrysler – P0151 Chrysler

P0151 Chrysler Code - O2 sensor 2/1 Circuit Low

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 Chrysler indicates O2 sensor 2/1 Circuit Low.
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 15,466

How popular is this code, among other codes? Low

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 30, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0151 Chrysler 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 Chrysler - O2 sensor 2/1 Circuit Low - AutoCodes.com — P0151 Chrysler Code - O2 sensor 2/1 Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0151 Chrysler?

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 Chrysler?

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.

There is a Factory Service Bulletin for the 2005-2006 Chrysler 300:
2005-2006 Chrysler 300 Factory Service Bulletin OBDII Code P0151

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0151 Chrysler 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 Chrysler code?

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

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

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 Chrysler Code

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

Possible symptoms include poor fuel efficiency, rough idling, engine misfires, and the illumination of the check engine light.

2. What does the O2 sensor 2/1 Circuit Low code P0151 indicate in a Chrysler vehicle?

This code typically indicates that the upstream oxygen sensor in bank 2, sensor 1 is reading a voltage below the expected range.

3. What are some possible causes of OBDII code P0151 in a Chrysler vehicle?

Potential causes include a faulty oxygen sensor, damaged wiring or connectors, exhaust system leaks, or issues with the engine's air-fuel mixture.

4. How can I diagnose the O2 sensor 2/1 Circuit Low code P0151 in my Chrysler vehicle?

Diagnosing this code usually involves inspecting the oxygen sensor and its wiring, checking for exhaust leaks, and testing the sensor's voltage output with a multimeter.

5. Can I continue driving my Chrysler with the OBDII code P0151 triggered?

While the vehicle may still be operable with this code, it is recommended to address the issue promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance.

6. Is it possible to reset the O2 sensor 2/1 Circuit Low code P0151 in a Chrysler without making any repairs?

Simply clearing the code without addressing the underlying issue will likely result in it reoccurring. It is best to diagnose and repair the root cause before clearing the code.

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

The cost of repair can vary depending on the cause of the issue, but it may involve replacing the oxygen sensor, repairing wiring, or fixing exhaust leaks. Costs can range from around $100 to $300 or more.

8. Can I replace the O2 sensor in my Chrysler myself to fix code P0151?

Replacing an oxygen sensor can be a DIY project for some individuals, but it requires basic mechanical skills and the right tools. Ensure you follow proper procedures and have the correct replacement part.

9. How often should the oxygen sensors be replaced in a Chrysler vehicle to prevent code P0151?

Oxygen sensors typically have a lifespan of around 60,000 to 100,000 miles. Regular maintenance and monitoring can help prevent issues like code P0151 by replacing sensors at the manufacturer's recommended intervals.

10. Will fixing OBDII code P0151 improve my Chrysler's fuel efficiency and performance?

Addressing this code can lead to improved fuel efficiency, smoother engine operation, and better overall performance of the vehicle. It is important to resolve the issue promptly to avoid further complications.