P0138 2009 Honda Accord Code - HO2S Bank 1 Sensor 2 Circuit Low Voltage
Quick Answer
The P0138 diagnostic trouble code (DTC) for a 2009 Honda Accord refers to an issue with the HO2S (Heated Oxygen Sensor) Bank 1 Sensor 2 circuit having low voltage. Common causes include Faulty HO2S Bank 1 Sensor 2, Wiring or connector issues in the sensor circuit, Exhaust leaks near the sensor. 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 2009 Honda Accord indicates HO2S Bank 1 Sensor 2 Circuit Low Voltage.
- Common causes
- Common causes include Faulty HO2S Bank 1 Sensor 2, Wiring or connector issues in the sensor circuit, Exhaust leaks near the sensor.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0138 2009 Honda Accord Description
The P0138 diagnostic trouble code (DTC) for a 2009 Honda Accord refers to an issue with the HO2S (Heated Oxygen Sensor) Bank 1 Sensor 2 circuit having low voltage. This sensor is responsible for monitoring the oxygen levels in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. When the voltage from this sensor is lower than expected, it can lead to various performance issues in the vehicle.
Common Causes of P0138 2009 Honda Accord
- Faulty HO2S Bank 1 Sensor 2
- Wiring or connector issues in the sensor circuit
- Exhaust leaks near the sensor
- Engine running rich due to a faulty fuel injector
- ECM software or hardware issues
Symptoms of P0138 2009 Honda Accord
- Decreased fuel efficiency
- Rough idling or stalling
- Engine misfires
- Illuminated check engine light
- Failed emissions test
How to Fix P0138 2009 Honda Accord
- Begin by inspecting the wiring and connector of the HO2S Bank 1 Sensor 2 for any damage or corrosion. Repair or replace as necessary.
- Test the sensor using a multimeter to ensure it is functioning correctly. Replace the sensor if it is faulty.
- Check for exhaust leaks near the sensor and repair them to prevent false readings.
- Perform a fuel injector test to determine if any injectors are causing the engine to run rich. Replace faulty injectors if needed.
- Clear the DTC using an OBD-II scanner and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0138 2009 Honda Accord
The typical repair costs for addressing a P0138 code on a 2009 Honda Accord can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. It is important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Factors such as location, vehicle make and model, and engine type can also impact the overall repair costs. It is recommended to obtain quotes from local auto repair shops for a more accurate estimate.
Tech Notes for P0138 2009 Honda Accord
When is the Code Detected?
Need more information about the P0138 2009 Honda Accord code?
Need more information on how to fix the P0138 2009 Honda Accord code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0138 2009 Honda Accord code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0138 2009 Honda Accord Code
1. What does OBDII code P0138 mean for a 2009 Honda Accord?
- OBDII code P0138 for a 2009 Honda Accord refers to the HO2S (Heated Oxygen Sensor) Bank 1 Sensor 2 Circuit Low Voltage.
2. What are the common symptoms of OBDII code P0138 in a 2009 Honda Accord?
- Common symptoms of P0138 in a 2009 Honda Accord may include poor fuel economy, rough idling, difficulty starting the engine, and an illuminated check engine light.
3. What are the possible causes of the HO2S Bank 1 Sensor 2 Circuit Low Voltage code in a 2009 Honda Accord?
- Possible causes of the P0138 code in a 2009 Honda Accord include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, or issues with the engine's air-fuel mixture.
4. How can I diagnose the HO2S Bank 1 Sensor 2 Circuit Low Voltage issue in my 2009 Honda Accord?
- To diagnose the P0138 code, you can use an OBDII scanner to read the code and check the voltage output of the oxygen sensor. Additionally, inspect the sensor's wiring and connectors for any signs of damage.
5. Can a dirty or contaminated oxygen sensor cause the P0138 code in a 2009 Honda Accord?
- Yes, a dirty or contaminated oxygen sensor can lead to the P0138 code in a 2009 Honda Accord as it may affect the sensor's ability to accurately measure the oxygen levels in the exhaust gases.
6. What are some repair tips for addressing the HO2S Bank 1 Sensor 2 Circuit Low Voltage issue in a 2009 Honda Accord?
- Repair tips for the P0138 code in a 2009 Honda Accord may include replacing the oxygen sensor, repairing damaged wiring or connectors, fixing any exhaust leaks, and ensuring proper engine maintenance.
7. Is it safe to continue driving a 2009 Honda Accord with the P0138 code illuminated?
- It is generally not recommended to drive a 2009 Honda Accord with the P0138 code illuminated, as it can lead to decreased fuel efficiency and potentially cause damage to the engine over time.
8. How much can I expect to pay for repairing the HO2S Bank 1 Sensor 2 Circuit Low Voltage issue in a 2009 Honda Accord?
- The cost of repairing the P0138 code in a 2009 Honda Accord can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.
9. Can resetting the check engine light temporarily resolve the P0138 code in a 2009 Honda Accord?
- Resetting the check engine light may temporarily turn off the warning indicator, but it will not fix the underlying issue causing the P0138 code in a 2009 Honda Accord. It is recommended to diagnose and address the problem promptly.
10. How often should I replace the oxygen sensors in a 2009 Honda Accord to prevent recurring P0138 codes?
- Oxygen sensors typically have a lifespan of around 100,000 miles, but it is advisable to follow the manufacturer's recommendations for sensor replacement intervals to prevent recurring P0138 codes in a 2009 Honda Accord.
Discuss the causes and fixes for P0138 2009 Honda Accord OBDII Code
Code P0138 2009 Honda Accord comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.