P0146 Mitsubishi Code - Heated Oxygen Sensor Circuit Slow Response Bank 1 Sensor 3
Quick Answer
The rear heated oxygen sensor (or sensor 3 for some vehicles), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Heated Oxygen Sensor Bank 1 Sensor 3, Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted, Heated Oxygen Sensor Bank 1 Sensor 3 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
- P0146 Mitsubishi indicates Heated Oxygen Sensor Circuit Slow Response Bank 1 Sensor 3.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor Bank 1 Sensor 3, Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted, Heated Oxygen Sensor Bank 1 Sensor 3 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 P0146 Mitsubishi Description
This sensor is made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. Under normal conditions the heated oxygen sensor 3 is not used for engine control operation.
What are the Possible Causes of the DTC P0146 Mitsubishi?
- Faulty Heated Oxygen Sensor Bank 1 Sensor 3
- Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted
- Heated Oxygen Sensor Bank 1 Sensor 3 circuit poor electrical connection
How to Fix the DTC P0146 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0146 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 P0146 Mitsubishi Code
1. What are the common symptoms of OBDII code P0146 in a Mitsubishi?
The common symptoms of code P0146 include poor fuel economy, rough idling, hesitation or stalling during acceleration, and the illumination of the Check Engine Light.
2. What does the OBDII code P0146 for a Mitsubishi mean?
Code P0146 indicates a slow response from the heated oxygen sensor (HO2S) located on Bank 1 Sensor 3 in the exhaust system.
3. What are the possible causes of OBDII code P0146 in a Mitsubishi?
Common causes of code P0146 include a faulty oxygen sensor, wiring or connector issues, exhaust leaks, fuel system problems, or an issue with the engine control module (ECM).
4. How can I diagnose the issue causing OBDII code P0146 in my Mitsubishi?
To diagnose the issue, you can use an OBDII scanner to retrieve the code and then inspect the oxygen sensor, wiring, and connectors for any visible damage. You may also conduct a resistance test on the sensor to check its functionality.
5. Can I drive my Mitsubishi with OBDII code P0146?
It is not recommended to drive your Mitsubishi with a persistent P0146 code, as it can lead to poor engine performance and potential damage over time. It's best to address the issue promptly.
6. How can I repair OBDII code P0146 in my Mitsubishi?
Repairing code P0146 may involve replacing the faulty oxygen sensor, repairing damaged wiring or connectors, fixing exhaust leaks, addressing fuel system issues, or reprogramming the ECM if necessary.
7. How much does it cost to fix OBDII code P0146 in a Mitsubishi?
The cost of repairing code P0146 can vary depending on the exact cause of the issue and whether you choose to do the repairs yourself or take your Mitsubishi to a mechanic. Costs may range from around $100 to $500 or more.
8. Can a DIY enthusiast fix OBDII code P0146 in a Mitsubishi?
Yes, if you have the necessary tools and knowledge, you may be able to fix code P0146 yourself by following repair guides or consulting with automotive forums. However, if you're unsure, it's always best to seek professional help.
9. How urgent is it to address OBDII code P0146 in my Mitsubishi?
While your Mitsubishi may still be driveable with code P0146, it's essential to address the issue promptly to prevent further damage and ensure optimal engine performance and fuel efficiency.
10. Is it common for the heated oxygen sensor on Bank 1 Sensor 3 to fail in Mitsubishis?
While failures of the heated oxygen sensor on Bank 1 Sensor 3 in Mitsubishis are not extremely common, they can occur due to age, wear, or other underlying issues. Regular maintenance and prompt attention to any related symptoms can help prevent such failures.
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