AutoCodes – Honda – P0135 2009 Honda Accord

P0135 2009 Honda Accord Code - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1

Quick Answer

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground. 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 2009 Honda Accord indicates O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1.
Common causes: Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground.
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 13,301

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 Apr 22, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0135 2009 Honda Accord Description

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.

OBDII Code P0135 2009 Honda Accord - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1 - AutoCodes.com — P0135 2009 Honda Accord Code - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0135 2009 Honda Accord?

Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1
Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse
Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground
Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0135 2009 Honda Accord?

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 does this mean?

Code Tech Notes

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it take the sensor to warm up and start sending an adequate signal. The code is triggered when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the sensor and connector are OK, replacing the O2 Sensor 1 usually takes care of the problem

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0135 2009 Honda Accord 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.

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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 2009 Honda Accord Code

1. What are the common symptoms of OBDII code P0135 in a 2009 Honda Accord?

- The common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the check engine light.

2. What does the OBDII code P0135 indicate in a 2009 Honda Accord?

- The code P0135 indicates a malfunction in the O2 sensor heater circuit of Bank 1 Sensor 1 in the vehicle's exhaust system.

3. What are the possible causes of the O2 sensor heater circuit malfunction in a 2009 Honda Accord?

- The potential causes include a faulty O2 sensor, damaged wiring or connectors, a blown fuse, or a problem with the vehicle's ECM.

4. How can I diagnose the O2 sensor heater circuit malfunction in my 2009 Honda Accord?

- You can use a multimeter to test the resistance of the O2 sensor heater circuit, check for continuity in the wiring, and inspect the sensor and its connections for any visible damage.

5. Can I continue driving my 2009 Honda Accord with the OBDII code P0135 present?

- It is not recommended to drive the vehicle with this code as it can lead to decreased fuel efficiency and potential damage to the engine over time.

6. How can I repair the O2 sensor heater circuit malfunction in my 2009 Honda Accord?

- The repair typically involves replacing the faulty O2 sensor, repairing any damaged wiring or connectors, and resetting the check engine light using an OBDII scanner.

7. Is it possible to clear the OBDII code P0135 in a 2009 Honda Accord without making any repairs?

- Clearing the code without addressing the underlying issue will not resolve the problem, and the check engine light is likely to reappear once the vehicle is driven again.

8. How much does it cost to fix the O2 sensor heater circuit malfunction in a 2009 Honda Accord?

- The cost of repair can vary depending on the cause of the issue, but it typically ranges from $150 to $400 for parts and labor.

9. Can a DIY enthusiast replace the O2 sensor in a 2009 Honda Accord to fix the P0135 code?

- Yes, replacing the O2 sensor can be a relatively straightforward DIY task with the right tools and some automotive experience.

10. How long does it take to repair the O2 sensor heater circuit malfunction in a 2009 Honda Accord?

- The repair can usually be completed within an hour to a few hours, depending on the extent of the issue and the skill level of the person performing the repair.