AutoCodes – Honda – P0138 2018 Honda CR-V

P0138 2018 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 2018 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 247
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 2018 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 2018 Honda CR-V - Secondary Heated Oxygen Sensor 2 Circuit High Voltage - AutoCodes.com
P0138 2018 Honda CR-V Code - Secondary Heated Oxygen Sensor 2 Circuit High Voltage

What are the Possible Causes of the DTC P0138 2018 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 2018 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 2018 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 2018 Honda CR-V code?

Need more information on how to fix the P0138 2018 Honda CR-V code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0138 2018 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 2018 Honda CR-V Code

1. What does OBDII code P0138 on a 2018 Honda CR-V mean?

The code P0138 in a 2018 Honda CR-V indicates a high voltage condition in the Secondary Heated Oxygen Sensor 2 circuit.

2. What are the common symptoms of a P0138 code in a 2018 Honda CR-V?

Common symptoms of a P0138 code in a 2018 Honda CR-V may include poor fuel economy, rough idling, engine hesitation, and an illuminated check engine light.

3. What are the possible causes of a P0138 code in a 2018 Honda CR-V?

Possible causes of a P0138 code in a 2018 Honda CR-V include a faulty secondary heated oxygen sensor, wiring issues, damaged connectors, or an exhaust system leak.

4. How can I diagnose a P0138 code in my 2018 Honda CR-V?

Diagnosing a P0138 code in a 2018 Honda CR-V involves inspecting the secondary heated oxygen sensor and its wiring for any visible damage, testing the sensor's voltage, and checking for exhaust leaks.

5. Can I continue to drive my 2018 Honda CR-V with a P0138 code?

It is not recommended to drive your 2018 Honda CR-V with a P0138 code as it can lead to poor engine performance and potential damage to the catalytic converter.

6. How can I repair a P0138 code on my 2018 Honda CR-V?

Repairing a P0138 code on a 2018 Honda CR-V may involve replacing the secondary heated oxygen sensor, repairing or replacing damaged wiring or connectors, and clearing the error code.

7. Is it possible to reset a P0138 code on a 2018 Honda CR-V without fixing the issue?

Resetting a P0138 code on a 2018 Honda CR-V without addressing the underlying problem may temporarily turn off the check engine light, but the issue will likely reoccur.

8. How much does it cost to repair a P0138 code on a 2018 Honda CR-V?

The cost of repairing a P0138 code on a 2018 Honda CR-V can vary depending on the cause of the issue, but it may involve a sensor replacement, which can range from $150 to $300 or more.

9. Are there any DIY tips for addressing a P0138 code on a 2018 Honda CR-V?

DIY tips for addressing a P0138 code on a 2018 Honda CR-V include checking the sensor's wiring for damage, ensuring proper connections, and using a code reader to clear the error code after any repairs.

10. How long does it take to repair a P0138 code on a 2018 Honda CR-V?

The repair time for a P0138 code on a 2018 Honda CR-V can vary depending on the extent of the issue and the repair process involved, but it may take a few hours to complete the necessary repairs.

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