AutoCodes – Honda – P0138 2019 Honda CR-V

P0138 2019 Honda CR-V Code - Secondary Heated Oxygen Sensor 2 Circuit High Voltage

Quick Answer

The Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2)) detects the oxygen content in the exhaust gas downstream of the three-way catalytic converter (TWC) during stoichiometric air/fuel ratio feedback control. Common causes include Faulty Secondary Heated Oxygen Sensor 2, Secondary Heated Oxygen Sensor 2 harness is open or shorted, Secondary Heated Oxygen Sensor 2 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 2019 Honda CR-V indicates Secondary Heated Oxygen Sensor 2 Circuit High Voltage.
Common causes
Common causes include Faulty Secondary Heated Oxygen Sensor 2, Secondary Heated Oxygen Sensor 2 harness is open or shorted, Secondary Heated Oxygen Sensor 2 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.
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Code Popularity 195
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 14, 2023
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Code P0138 2019 Honda CR-V Description

The Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2)) detects the oxygen content in the exhaust gas downstream of the three-way catalytic converter (TWC) during stoichiometric air/fuel ratio feedback control. The Powertrain Control Module (PCM) controls the air/fuel ratio from the Air/Fuel Ratio (A/F) Sensor (Sensor 1) output voltage to optimize the TWC efficiency. When power is applied to the Secondary HO2S (Sensor 2) heater, if the Secondary HO2S (Sensor 2) output voltage is high or the SO2SG terminal voltage is high during feedback control, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).
OBDII Code P0138 2019 Honda CR-V - Secondary Heated Oxygen Sensor 2 Circuit High Voltage - AutoCodes.com
P0138 2019 Honda CR-V Code - Secondary Heated Oxygen Sensor 2 Circuit High Voltage

What are the Possible Causes of the DTC P0138 2019 Honda CR-V?

  • Faulty Secondary Heated Oxygen Sensor 2
  • Secondary Heated Oxygen Sensor 2 harness is open or shorted
  • Secondary Heated Oxygen Sensor 2 circuit poor electrical connection

How to Fix the DTC P0138 2019 Honda CR-V?

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 2019 Honda CR-V 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.

Need more information about the P0138 2019 Honda CR-V code?

Need more information on how to fix the P0138 2019 Honda CR-V code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0138 2019 Honda CR-V code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0138 2019 Honda CR-V Code

1. What are the common symptoms of OBDII code P0138 on a 2019 Honda CR-V?

The common symptoms of P0138 include poor fuel economy, rough idling, loss of power, and the illumination of the check engine light.

2. What does the OBDII code P0138 in a 2019 Honda CR-V mean?

P0138 indicates that the secondary heated oxygen sensor 2 circuit is registering high voltage levels, which may suggest an issue with the sensor or the vehicle's oxygen sensor system.

3. What are the possible causes of the P0138 code in a 2019 Honda CR-V?

Potential causes of P0138 include a faulty secondary heated oxygen sensor, damaged wiring or connectors in the sensor circuit, exhaust leaks, or issues with the engine's air-fuel ratio.

4. How can I diagnose the P0138 code in a 2019 Honda CR-V?

Diagnosing P0138 involves using an OBDII scanner to retrieve the code, inspecting the secondary heated oxygen sensor and its wiring for damage, checking for exhaust leaks, and performing tests to verify the sensor's functionality.

5. Can I drive my 2019 Honda CR-V with the P0138 code?

It is generally not recommended to drive with the P0138 code illuminated, as it can lead to decreased fuel efficiency and potential engine damage. It's advisable to address the issue promptly.

6. How can I repair the P0138 code on my 2019 Honda CR-V?

Repairing P0138 may involve replacing the secondary heated oxygen sensor, repairing or replacing damaged wiring or connectors, fixing exhaust leaks, and clearing the code with an OBDII scanner.

7. Are there any DIY tips for fixing the P0138 code in a 2019 Honda CR-V?

While some basic diagnostics can be done at home, replacing the secondary heated oxygen sensor or addressing more complex issues related to P0138 may require professional assistance to ensure proper repair.

8. How much does it cost to fix the P0138 code on a 2019 Honda CR-V?

The cost of fixing P0138 can vary depending on the root cause of the issue, the need for parts replacement, and labor costs. It's recommended to obtain quotes from reputable mechanics or service centers.

9. Is the P0138 code a serious issue in a 2019 Honda CR-V?

While the P0138 code may not cause immediate drivability issues, it can affect the vehicle's performance and fuel efficiency over time. Addressing the code promptly can prevent further damage.

10. Can resetting the check engine light resolve the P0138 code in a 2019 Honda CR-V?

Simply resetting the check engine light will not fix the underlying issue causing the P0138 code. It's crucial to diagnose the problem, make necessary repairs, and clear the code with an OBDII scanner to resolve the issue effectively.

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