AutoCodes – Ford – P0135 2011 Ford Fusion

P0135 2011 Ford Fusion Code - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1

Quick Answer

During testing the heated oxygen sensor (HO2S) heaters are checked for open and short circuits and excessive current draw. Common causes include Vacuum hose disconnected on exhaust gas recirculation (EGR) system module (ESM) applications, Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse. 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 2011 Ford Fusion indicates O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1.
Common causes: Common causes include Vacuum hose disconnected on exhaust gas recirculation (EGR) system module (ESM) applications, Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse.
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 4,712

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 2011 Ford Fusion Description

During testing the heated oxygen sensor (HO2S) heaters are checked for open and short circuits and excessive current draw. The test fails when the current draw exceeds a calibrated limit or an open or short circuit is detected.

OBDII Code P0135 2011 Ford Fusion - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1 - AutoCodes.com — P0135 2011 Ford Fusion Code - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0135 2011 Ford Fusion?

Vacuum hose disconnected on exhaust gas recirculation (EGR) system module (ESM) applications
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 2011 Ford Fusion?

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, and there are no vacuum leaks 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 2011 Ford Fusion 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 2011 Ford Fusion Code

1. What are the common symptoms of OBDII code P0135 in a 2011 Ford Fusion?

- Common symptoms include poor fuel economy, rough idling, stalling, and the illumination of the Check Engine Light.

2. What does the OBDII code P0135 for a 2011 Ford Fusion mean?

- The code signifies an O2 Sensor Heater Circuit Malfunction in Bank 1 Sensor 1, indicating an issue with the heating element in the upstream oxygen sensor.

3. What are the possible causes of the O2 Sensor Heater Circuit Malfunction in a 2011 Ford Fusion?

- Potential causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or a problem with the engine control module.

4. How can I diagnose the O2 Sensor Heater Circuit issue in my 2011 Ford Fusion?

- You can use a multimeter to test the oxygen sensor's heater circuit resistance, check for damaged wiring, inspect the fuse, and scan for related trouble codes.

5. Can I drive my 2011 Ford Fusion with the P0135 code?

- It is not recommended to drive with the P0135 code illuminated as it can lead to decreased fuel efficiency and potential engine performance issues.

6. How can I repair the O2 Sensor Heater Circuit Malfunction in my 2011 Ford Fusion?

- Repair options include replacing the faulty oxygen sensor, repairing damaged wiring or connectors, checking and replacing the fuse if needed, or addressing any ECM issues.

7. Will resetting the OBDII code P0135 on a 2011 Ford Fusion make it go away permanently?

- Simply resetting the code may temporarily turn off the Check Engine Light, but if the underlying issue is not fixed, the code is likely to reappear after driving cycles.

8. Is it safe to continue driving the 2011 Ford Fusion if the O2 Sensor Heater Circuit Malfunction is not repaired?

- It is best to address the issue promptly to avoid potential long-term damage to the catalytic converter and other engine components.

9. Can a DIY enthusiast fix the O2 Sensor Heater Circuit Malfunction in a 2011 Ford Fusion?

- Depending on your skill level and access to tools, DIY enthusiasts can often replace the oxygen sensor or address wiring issues, but more complex problems may require professional help.

10. How much does it cost to repair the OBDII code P0135 in a 2011 Ford Fusion?

- The cost of repair can vary based on the cause of the issue, but it typically ranges from $150 to $400 for parts and labor, with DIY repairs being more cost-effective.