P0051 Mitsubishi Code - Cylinder 2-3 Heated Oxygen Sensor Front Heater Control Circuit Low
Quick Answer
Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 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
- P0051 Mitsubishi indicates Cylinder 2-3 Heated Oxygen Sensor Front Heater Control Circuit Low.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 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.
Code P0051 Mitsubishi Description
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
What are the Possible Causes of the DTC P0051 Mitsubishi?
- Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical connection
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 fuse
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0051 Mitsubishi?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0051 Mitsubishi 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.
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Frequently Asked Questions about P0051 Mitsubishi Code
1. What are the common symptoms of OBDII code P0051 in a Mitsubishi related to the Cylinder 2-3 Heated Oxygen Sensor Front Heater Control Circuit Low?
The common symptoms include poor fuel economy, rough idling, decreased engine performance, and an illuminated check engine light.
2. What are the possible causes of OBDII code P0051 in a Mitsubishi for the Cylinder 2-3 Heated Oxygen Sensor Front Heater Control Circuit Low?
Possible causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or an issue with the engine control module (ECM).
3. How can I diagnose the OBDII code P0051 in a Mitsubishi for the Cylinder 2-3 Heated Oxygen Sensor Front Heater Control Circuit Low?
Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the wiring and connectors for damage, checking the fuse related to the oxygen sensor, and testing the oxygen sensor itself.
4. What is the repair process for OBDII code P0051 in a Mitsubishi for the Cylinder 2-3 Heated Oxygen Sensor Front Heater Control Circuit Low?
The repair process may involve replacing the oxygen sensor, repairing or replacing damaged wiring or connectors, checking and replacing the fuse if necessary, and resetting the ECM.
5. Can I drive my Mitsubishi with OBDII code P0051 related to the Cylinder 2-3 Heated Oxygen Sensor Front Heater Control Circuit Low?
It is not recommended to drive the vehicle with this code present, as it can lead to further damage and poor engine performance. It is best to address the issue as soon as possible.
6. How much does it cost to repair OBDII code P0051 in a Mitsubishi for the Cylinder 2-3 Heated Oxygen Sensor Front Heater Control Circuit Low?
The cost of repair can vary depending on the specific issue causing the code, but it may range from $100 to $400 for parts and labor.
7. Can a DIY enthusiast fix OBDII code P0051 in a Mitsubishi related to the Cylinder 2-3 Heated Oxygen Sensor Front Heater Control Circuit Low?
While some experienced DIY enthusiasts may be able to address this issue, it is recommended to have a qualified mechanic diagnose and repair the problem to ensure it is properly fixed.
8. How often does OBDII code P0051 in a Mitsubishi for the Cylinder 2-3 Heated Oxygen Sensor Front Heater Control Circuit Low occur?
This code can occur sporadically or persistently, depending on the underlying issue. Regular maintenance and prompt repairs can help prevent its occurrence.
9. Is OBDII code P0051 in a Mitsubishi related to the Cylinder 2-3 Heated Oxygen Sensor Front Heater Control Circuit Low a serious problem?
While the issue may not cause immediate harm to the vehicle, ignoring the code can lead to decreased fuel efficiency, engine performance issues, and potential damage to other components over time.
10. How long does it take to repair OBDII code P0051 in a Mitsubishi for the Cylinder 2-3 Heated Oxygen Sensor Front Heater Control Circuit Low?
The repair time can vary based on the specific cause of the code and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the issue.
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