AutoCodes – Ford – P0135 2009 Ford Fusion

P0135 2009 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 2009 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 4,425

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 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 2009 Ford Fusion - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1 - AutoCodes.com — P0135 2009 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 2009 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 2009 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 2009 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 2009 Ford Fusion Code

1. What are the common symptoms of OBDII code P0135 on a 2009 Ford Fusion?

- Common symptoms include decreased fuel efficiency, rough idling, and an illuminated check engine light.

2. What does the O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1 code mean on a 2009 Ford Fusion?

- This code indicates that there is a problem with the heating element circuit of the oxygen sensor located in the exhaust system before the catalytic converter on bank 1.

3. What are the possible causes of the P0135 code on a 2009 Ford Fusion?

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

4. How can I diagnose the issue causing the P0135 code on my 2009 Ford Fusion?

- You can diagnose the issue by checking the oxygen sensor's wiring and connectors for damage, testing the oxygen sensor's heater circuit resistance, and inspecting related fuses.

5. Can I continue driving my 2009 Ford Fusion with the P0135 code?

- It is not recommended to continue driving with the P0135 code as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.

6. How can I repair the O2 Sensor Heater Circuit Malfunction on a 2009 Ford Fusion?

- Repair involves replacing the faulty oxygen sensor, repairing damaged wiring or connectors, and ensuring the heater circuit is functioning properly.

7. Are there any DIY tips for fixing the P0135 code on a 2009 Ford Fusion?

- DIY tips include checking and cleaning the oxygen sensor connectors, inspecting the wiring for damage, and verifying the fuse related to the heater circuit.

8. How much does it typically cost to repair the P0135 code on a 2009 Ford Fusion?

- The cost of repair can vary depending on the cause of the issue, but it may range from $100 to $300 for parts and labor.

9. How long does it take to fix the O2 Sensor Heater Circuit Malfunction on a 2009 Ford Fusion?

- The repair time can vary depending on the exact cause of the issue, but it typically takes around 1-2 hours for a professional mechanic to diagnose and fix the problem.

10. Can a P0135 code be triggered by other underlying issues besides a faulty oxygen sensor?

- Yes, other potential underlying issues that can trigger the P0135 code include wiring issues, blown fuses, or problems with the engine control module (ECM).