AutoCodes – Honda – P0135 2021 Honda CR-V

P0135 2021 Honda CR-V Code - Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction

Quick Answer

A heater for the sensor element is embedded in the Air/Fuel Ratio (A/F) Sensor (Sensor 1), and it is controlled by the Powertrain Control Module (PCM). Common causes include Faulty Air/Fuel Ratio (A/F) Sensor (Sensor 1), A/F Sensor (Sensor 1) harness is open or shorted, A/F Sensor (Sensor 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: P0135 2021 Honda CR-V indicates Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction.
Common causes: Common causes include Faulty Air/Fuel Ratio (A/F) Sensor (Sensor 1), A/F Sensor (Sensor 1) harness is open or shorted, A/F Sensor (Sensor 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.

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Code Popularity 296

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 11, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0135 2021 Honda CR-V Description

A heater for the sensor element is embedded in the Air/Fuel Ratio (A/F) Sensor (Sensor 1), and it is controlled by the Powertrain Control Module (PCM). It is activated and heats the sensor to stabilize and speed up the detection of oxygen content when the exhaust gas temperature is cold. The PCM monitors the A/F Sensor (Sensor 1) heater output (return check). If the return signals do not meet the command value (for heater activation) for a set time, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0135 2021 Honda CR-V - Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction - AutoCodes.com — P0135 2021 Honda CR-V Code - Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0135 2021 Honda CR-V?

Faulty Air/Fuel Ratio (A/F) Sensor (Sensor 1)
A/F Sensor (Sensor 1) harness is open or shorted
A/F Sensor (Sensor 1) circuit poor electrical connection

How to Fix the DTC P0135 2021 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0135 2021 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 P0135 2021 Honda CR-V code?

Need more information on how to fix the P0135 2021 Honda CR-V code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0135 2021 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 P0135 2021 Honda CR-V Code

1. What does OBDII code P0135 mean on a 2021 Honda CR-V?

The code P0135 indicates a malfunction in the Air/Fuel Ratio Sensor 1 Heater Circuit on a 2021 Honda CR-V.

2. What are the common symptoms of OBDII code P0135 on a 2021 Honda CR-V?

Common symptoms of P0135 include poor fuel efficiency, rough idling, and a noticeable decrease in engine performance.

3. What are the possible causes of OBDII code P0135 on a 2021 Honda CR-V?

Potential causes of P0135 include a faulty air/fuel ratio sensor, damaged wiring or connectors, or issues with the sensor's heater circuit.

4. How can I diagnose the Air/Fuel Ratio Sensor 1 Heater Circuit malfunction on my 2021 Honda CR-V?

Diagnosing P0135 typically involves checking the sensor's wiring for damage, testing the heater circuit for continuity, and ensuring proper voltage supply to the sensor.

5. Can I continue driving my 2021 Honda CR-V with OBDII code P0135?

While it may be possible to drive with P0135, it is not recommended as it can lead to decreased fuel efficiency and potential damage to other engine components.

6. How can I repair OBDII code P0135 on my 2021 Honda CR-V?

Repairing P0135 often involves replacing the Air/Fuel Ratio Sensor 1, repairing any damaged wiring, or addressing issues with the sensor's heater circuit.

7. Is it possible to reset the OBDII code P0135 on a 2021 Honda CR-V without fixing the issue?

Resetting the code without repairing the underlying issue will only temporarily clear the code, and it is likely to reappear once the problem persists.

8. How much does it typically cost to repair OBDII code P0135 on a 2021 Honda CR-V?

The cost of repairing P0135 can vary depending on the specific issue, but it may range from $150 to $400, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P0135 on a 2021 Honda CR-V?

While some aspects of diagnosing and repairing P0135 can be done by a skilled DIY enthusiast, it is recommended to seek professional help for accurate diagnosis and proper repair.

10. How often does OBDII code P0135 occur in a 2021 Honda CR-V?

P0135 can occur sporadically or be persistent, depending on the severity of the issue. It is important to address the problem promptly to avoid further complications.