AutoCodes – Honda – P0135 2020 Honda CR-V

P0135 2020 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 2020 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 346

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 2020 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 2020 Honda CR-V - Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction - AutoCodes.com — P0135 2020 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 2020 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 2020 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 2020 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 2020 Honda CR-V code?

Need more information on how to fix the P0135 2020 Honda CR-V code? Get Access to Factory Service Manuals

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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 2020 Honda CR-V Code

What does the OBDII code P0135 mean for a 2020 Honda CR-V?

P0135 indicates a malfunction in the heater circuit of the air/fuel ratio sensor 1, which can affect the engine's air-fuel mixture control.

What are common symptoms of the P0135 code?

Common symptoms include poor fuel economy, rough idling, increased emissions, and the check engine light illuminating.

What could cause the P0135 code to trigger?

Possible causes include a faulty air/fuel ratio sensor, damaged wiring or connectors, blown fuses, or issues with the engine control module (ECM).

Can I drive my 2020 Honda CR-V with the P0135 code?

While you can continue to drive the vehicle, it's not recommended due to potential damage to the engine and increased emissions. It's best to diagnose and fix the issue as soon as possible.

How can I diagnose the P0135 code?

Use an OBDII scanner to confirm the code, visually inspect the sensor and wiring for damage, check the fuse for the sensor's heater circuit, and test the sensor's resistance with a multimeter.

What is the typical cost to repair the P0135 code?

Repair costs can vary widely but may range from $100 to $400, depending on whether you need to replace the air/fuel ratio sensor or repair wiring issues.

Are there any temporary fixes for the P0135 code?

A temporary fix might include inspecting and repairing any visible wiring damage or ensuring all connectors are secure. However, a proper diagnosis and repair are recommended for long-term solutions.

How can I prevent the P0135 code from occurring in the future?

Regular vehicle maintenance, including checking the electrical connections and the condition of the sensors, can help prevent issues. Addressing any engine performance problems promptly can also reduce the risk.

Does the P0135 code affect my vehicle's emissions?

Yes, the P0135 code can lead to improper air-fuel mixture adjustments, which may result in increased emissions and potentially cause your vehicle to fail an emissions test.