P0138 2010 Honda Accord Code - HO2S Bank 1 Sensor 2 Circuit Low Voltage
Quick Answer
The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), 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
- P0138 2010 Honda Accord indicates HO2S Bank 1 Sensor 2 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 P0138 2010 Honda Accord Description
What are the Possible Causes of the DTC P0138 2010 Honda Accord?
- 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
- Intake air leaks
- Exhaust gas leaks
- Inappropriate fuel pressure
- Faulty fuel injectors
How to Fix the DTC P0138 2010 Honda Accord?
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 P0138 2010 Honda Accord 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 P0138 2010 Honda Accord Code
1. What does OBDII code P0138 on a 2010 Honda Accord indicate?
- This code, HO2S Bank 1 Sensor 2 Circuit Low Voltage, suggests a problem with the oxygen sensor (sensor 2) on bank 1 in your Accord's exhaust system.
2. What are the common symptoms of OBDII code P0138 in a 2010 Honda Accord?
- Common symptoms include poor fuel economy, rough idling, engine hesitation, and the illumination of the check engine light.
3. What are the possible causes of the HO2S Bank 1 Sensor 2 Circuit Low Voltage code in a 2010 Honda Accord?
- Causes could include a faulty oxygen sensor, wiring issues in the sensor circuit, exhaust leaks, or a problem with the engine's air-fuel mixture.
4. How can I diagnose the OBDII code P0138 on my 2010 Honda Accord?
- You can diagnose this code by using an OBDII scanner to read the code, inspecting the oxygen sensor and its wiring, checking for exhaust leaks, and testing the air-fuel ratio.
5. Can I drive my 2010 Honda Accord with the P0138 code?
- It is not recommended to drive your Accord with the P0138 code as it can lead to poor engine performance and potentially cause further damage.
6. How can I repair the HO2S Bank 1 Sensor 2 Circuit Low Voltage code on my 2010 Honda Accord?
- Repair options include replacing the oxygen sensor, repairing any damaged wiring, fixing exhaust leaks, or addressing issues with the engine's air-fuel mixture.
7. Are there any DIY tips for fixing the P0138 code in a 2010 Honda Accord?
- While some tasks like checking the sensor connections or replacing the sensor could be done by DIY enthusiasts, more complex repairs may require professional help.
8. How much does it typically cost to fix the OBDII code P0138 on a 2010 Honda Accord?
- The cost can vary depending on the root cause, but it may range from $100 to $400 for parts and labor if you need to replace the oxygen sensor or address wiring issues.
9. Will resetting the check engine light make the P0138 code go away in my 2010 Honda Accord?
- Resetting the check engine light will clear the code temporarily, but it will likely reappear if the underlying issue causing the P0138 code is not addressed.
10. How often should I replace the oxygen sensors in my 2010 Honda Accord to prevent OBDII codes like P0138?
- Oxygen sensors generally last around 60,000 to 90,000 miles, so it's recommended to replace them within this mileage range to avoid potential issues like the P0138 code.
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