P0138 2021 Honda CR-V Code - Secondary Heated Oxygen Sensor 2 Circuit High Voltage
Quick Answer
The P0138 code for a 2021 Honda CR-V specifically refers to the Secondary Heated Oxygen Sensor 2 Circuit High Voltage. Common causes include Faulty oxygen sensor: The most common cause of the P0138 code is a malfunctioning Secondary Heated Oxygen Sensor 2, Wiring issues: Damaged or corroded wiring connecting the sensor to the ECM can cause high voltage readings, Exhaust leaks: Leaks in the exhaust system before the O2 sensor can lead to false readings. 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 2021 Honda CR-V indicates Secondary Heated Oxygen Sensor 2 Circuit High Voltage.
- Common causes
- Common causes include Faulty oxygen sensor: The most common cause of the P0138 code is a malfunctioning Secondary Heated Oxygen Sensor 2, Wiring issues: Damaged or corroded wiring connecting the sensor to the ECM can cause high voltage readings, Exhaust leaks: Leaks in the exhaust system before the O2 sensor can lead to false readings.
- 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.
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Code P0138 2021 Honda CR-V Description
The P0138 code for a 2021 Honda CR-V specifically refers to the Secondary Heated Oxygen Sensor 2 Circuit High Voltage. The oxygen sensor, also known as the O2 sensor, plays a crucial role in monitoring the oxygen levels in the exhaust gases as they exit the engine. The Secondary Heated Oxygen Sensor 2 is typically located downstream of the catalytic converter. This sensor helps the engine control module (ECM) monitor the efficiency of the catalytic converter and adjust the air-fuel mixture for optimal performance and emissions.
Common Causes of P0138 2021 Honda CR-V
- Faulty oxygen sensor: The most common cause of the P0138 code is a malfunctioning Secondary Heated Oxygen Sensor 2.
- Wiring issues: Damaged or corroded wiring connecting the sensor to the ECM can cause high voltage readings.
- Exhaust leaks: Leaks in the exhaust system before the O2 sensor can lead to false readings.
- Engine running rich: Issues with the fuel injectors, fuel pressure regulator, or air intake system can cause the engine to run rich.
Symptoms of P0138 2021 Honda CR-V
- Decreased fuel efficiency: A faulty oxygen sensor can cause the engine to run rich, leading to decreased gas mileage.
- Rough idling or stalling: An incorrect air-fuel mixture can cause the engine to idle roughly or even stall.
- Check Engine Light: The illumination of the Check Engine Light is a common symptom of the P0138 code.
- Poor engine performance: A rich air-fuel mixture can result in sluggish acceleration and overall poor engine performance.
How to Fix P0138 2021 Honda CR-V
- Diagnose the issue: Use a scan tool to retrieve the trouble code and inspect the Secondary Heated Oxygen Sensor 2 and its wiring for any visible damage.
- Replace the oxygen sensor: If the sensor is faulty, replace it with a new one following manufacturer's instructions.
- Check and repair wiring: Inspect the wiring harness for any damage or corrosion and repair or replace as needed.
- Clear the trouble code: After making the repairs, clear the code with a scan tool and test drive the vehicle to ensure the issue is resolved.
Cost to Fix P0138 2021 Honda CR-V
The cost of repairing a P0138 code on a 2021 Honda CR-V can vary depending on the root cause of the issue. Typically, the cost of a new Secondary Heated Oxygen Sensor 2 can range from $50 to $200. Labor costs at an auto repair shop can range from $100 to $300, depending on the shop's hourly rate and the complexity of the repair. Overall, the total cost for repairing a P0138 code can be between $150 and $500. It's essential to consider additional costs for diagnostic time and any other necessary repairs that may be uncovered during the process.
Tech Notes for P0138 2021 Honda CR-V
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Frequently Asked Questions about P0138 2021 Honda CR-V Code
1. What are the common symptoms of OBDII code P0138 on a 2021 Honda CR-V?
The common symptoms of code P0138 on a 2021 Honda CR-V include poor fuel efficiency, rough idling, and the illumination of the check engine light.
2. What does the OBDII code P0138 on a 2021 Honda CR-V indicate?
Code P0138 in a 2021 Honda CR-V indicates an issue with the Secondary Heated Oxygen Sensor 2 Circuit High Voltage.
3. What are the possible causes of OBDII code P0138 on a 2021 Honda CR-V?
Possible causes of code P0138 on a 2021 Honda CR-V include a faulty oxygen sensor, wiring issues, exhaust leaks, or a malfunctioning catalytic converter.
4. How can I diagnose the cause of OBDII code P0138 on my 2021 Honda CR-V?
To diagnose the cause of code P0138, you can start by inspecting the oxygen sensor and its wiring for any visible damage. You may also use a multimeter to test the sensor's voltage and resistance.
5. Can I continue to drive my 2021 Honda CR-V with OBDII code P0138?
It is not recommended to drive your 2021 Honda CR-V with an unresolved P0138 code, as it can lead to poor engine performance and potential damage to the catalytic converter.
6. How can I repair OBDII code P0138 on my 2021 Honda CR-V?
Repairing code P0138 may involve replacing the Secondary Heated Oxygen Sensor 2, repairing any damaged wiring, fixing exhaust leaks, or addressing issues with the catalytic converter.
7. Will resetting the check engine light resolve OBDII code P0138 on my 2021 Honda CR-V?
Resetting the check engine light may temporarily turn it off, but if the underlying issue causing code P0138 is not addressed, the light is likely to come back on.
8. Are there any DIY tips for fixing OBDII code P0138 on a 2021 Honda CR-V?
While some basic checks like inspecting the sensor and wiring can be done DIY, it is recommended to consult a professional mechanic for a proper diagnosis and repair of code P0138.
9. How much does it typically cost to repair OBDII code P0138 on a 2021 Honda CR-V?
The cost of repairing code P0138 on a 2021 Honda CR-V can vary depending on the exact cause and the labor rates in your area. It's advisable to get multiple quotes from reputable mechanics.
10. How often should I have the oxygen sensors inspected on my 2021 Honda CR-V to prevent OBDII code P0138?
Regular maintenance schedules recommend having the oxygen sensors inspected during routine service intervals to help prevent issues like code P0138 on your 2021 Honda CR-V.
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