AutoCodes – Ford – P0135 2007 Ford Fusion

P0135 2007 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 2007 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 5,823

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 2007 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 2007 Ford Fusion - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1 - AutoCodes.com — P0135 2007 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 2007 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 2007 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 2007 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 2007 Ford Fusion Code

1. What are the common symptoms of OBDII code P0135 on a 2007 Ford Fusion?

- The common symptoms include poor fuel economy, rough idling, and an illuminated check engine light.

2. What does the OBDII code P0135 mean on a 2007 Ford Fusion?

- The code P0135 indicates a malfunction in the O2 sensor heater circuit for Bank 1 Sensor 1, located before the catalytic converter.

3. What are the possible causes of the O2 sensor heater circuit malfunction on a 2007 Ford Fusion?

- Potential causes include a faulty O2 sensor, damaged wiring or connectors, a blown fuse, or a problem with the PCM (Powertrain Control Module).

4. How can I diagnose the O2 sensor heater circuit malfunction on my 2007 Ford Fusion?

- You can use a multimeter to test the O2 sensor heater circuit for continuity, check the wiring and connectors for damage, and inspect the fuse related to the O2 sensor heater.

5. Can I still drive my 2007 Ford Fusion with OBDII code P0135?

- It's generally safe to drive the vehicle with this code, but you may experience decreased fuel efficiency and performance until the issue is resolved.

6. How can I repair the O2 sensor heater circuit malfunction on my 2007 Ford Fusion?

- To repair this issue, you may need to replace the faulty O2 sensor, repair damaged wiring or connectors, replace a blown fuse, or address any PCM-related problems.

7. Is it possible to reset the check engine light after fixing the O2 sensor heater circuit issue?

- Yes, you can reset the check engine light using an OBDII scanner or by disconnecting the car battery for a few minutes.

8. Are there any DIY tips for troubleshooting OBDII code P0135 on a 2007 Ford Fusion?

- DIY tips include checking the O2 sensor wiring and connectors for visible damage, ensuring the fuse related to the O2 sensor heater is intact, and testing the O2 sensor with a multimeter.

9. How much does it cost to repair the O2 sensor heater circuit malfunction on a 2007 Ford Fusion?

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

10. Can a faulty O2 sensor cause other problems in addition to triggering the OBDII code P0135 on a 2007 Ford Fusion?

- Yes, a faulty O2 sensor can lead to poor engine performance, increased emissions, and potential damage to the catalytic converter if left unresolved.