P0137 Mitsubishi Code - Cylinder 1-4 Heated Oxygen Rear Sensor Circuit Low Voltage
Quick Answer
The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 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
- P0137 Mitsubishi indicates Cylinder 1-4 Heated Oxygen Rear Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 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 P0137 Mitsubishi Description
What are the Possible Causes of the DTC P0137 Mitsubishi?
- Faulty Rear Heated Oxygen Sensor Bank 1
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks
How to Fix the DTC P0137 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 P0137 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 P0137 Mitsubishi Code
1. What does the OBDII code P0137 mean on a Mitsubishi?
P0137 indicates that the rear heated oxygen sensor (Bank 1, Sensor 2) is reporting a low voltage, which suggests an issue with the sensor or its circuit.
2. What are the common symptoms of code P0137 in a Mitsubishi?
Symptoms may include the check engine light turning on, decreased fuel efficiency, poor engine performance, or a failed emissions test.
3. What causes the P0137 code to trigger in a Mitsubishi?
Common causes include a faulty oxygen sensor, damaged or corroded wiring, exhaust leaks, or a malfunctioning engine control module (ECM).
4. Can I drive my Mitsubishi with a P0137 code?
You can drive with this code temporarily, but prolonged operation may lead to poor fuel economy and potential damage to the catalytic converter.
5. How do I fix the P0137 code on my Mitsubishi?
Repairs may involve replacing the rear oxygen sensor, repairing damaged wiring, fixing exhaust leaks, or, in rare cases, replacing the ECM.
6. How can I diagnose the P0137 code on a Mitsubishi?
Start by visually inspecting the wiring and connectors for damage or corrosion, check for exhaust leaks, and test the oxygen sensor with a multimeter.
7. How much does it cost to fix the P0137 code on a Mitsubishi?
Replacing the oxygen sensor typically costs $100–$300, including parts and labor, but costs may vary depending on the exact issue.
8. What happens if I ignore the P0137 code in my Mitsubishi?
Ignoring the code may lead to reduced fuel efficiency, increased emissions, and potential damage to the catalytic converter over time.
9. Can a bad catalytic converter cause a P0137 code in a Mitsubishi?
Yes, a failing catalytic converter can affect exhaust gas flow, potentially causing the rear oxygen sensor to report low voltage.
10. Will clearing the P0137 code solve the problem in my Mitsubishi?
Clearing the code will turn off the check engine light temporarily, but the issue will reoccur unless the underlying problem is fixed.
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