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Engine-Codes – Generic – C0035:04

C0035:04 Code - Left Front Wheel Speed Sensor Circuit Open

Quick Answer

The C0035:04 code indicates that there is an open circuit detected in the left front wheel speed sensor circuit. Common causes include Damaged wiring or connectors leading to the left front wheel speed sensor, Faulty left front wheel speed sensor, Corrosion or debris interfering with the sensor's operation. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
C0035:04 indicates Left Front Wheel Speed Sensor Circuit Open.
Common causes
Common causes include Damaged wiring or connectors leading to the left front wheel speed sensor, Faulty left front wheel speed sensor, Corrosion or debris interfering with the sensor's operation.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code C0035:04 Description

The C0035:04 code indicates that there is an open circuit detected in the left front wheel speed sensor circuit. The wheel speed sensor is a crucial component of the vehicle's anti-lock braking system (ABS) and traction control system. It works by monitoring the rotational speed of the wheel and sending this information to the vehicle's electronic control unit (ECU). This allows the ECU to determine if a wheel is locking up during braking or losing traction, enabling it to adjust brake pressure accordingly to maintain control and stability.

OBDII Code C0035:04 - Left Front Wheel Speed Sensor Circuit Open
C0035:04 Code - Left Front Wheel Speed Sensor Circuit Open

Common Causes of C0035:04

  1. Damaged wiring or connectors leading to the left front wheel speed sensor
  2. Faulty left front wheel speed sensor
  3. Corrosion or debris interfering with the sensor's operation
  4. Issues with the ECU receiving and processing the sensor's signals
  5. Electrical faults within the ABS system

Symptoms of C0035:04

  1. ABS warning light illuminated on the dashboard
  2. Traction control system malfunction
  3. Erratic braking behavior, such as pulsating brakes
  4. Increased stopping distances
  5. Loss of traction on slippery surfaces

How to Fix C0035:04

  1. Begin by visually inspecting the wiring and connectors leading to the left front wheel speed sensor for any signs of damage, corrosion, or wear. Replace or repair any damaged components.
  2. Test the left front wheel speed sensor using a multimeter to check for continuity and proper voltage output. Replace the sensor if it fails the test.
  3. Clear the diagnostic trouble codes (DTCs) using a scan tool and test drive the vehicle to see if the issue has been resolved.
  4. If the problem persists, further diagnostic testing may be necessary to pinpoint the exact cause of the open circuit, such as testing the ECU or checking for any underlying electrical faults within the ABS system.
  5. Once the root cause has been identified, repair or replace the faulty components as needed and retest the system to ensure proper functionality.

Cost to Fix C0035:04

The typical repair costs for addressing a left front wheel speed sensor circuit open issue can range from $150 to $400, depending on the cause of the problem and the specific components that need to be replaced. This estimate includes the cost of parts, such as a new wheel speed sensor or wiring harness, as well as labor charges for diagnosis and repair. It's important to note that the actual repair costs can vary significantly based on factors such as the vehicle make and model, the location of the repair shop, and the extent of the damage. Additionally, the time required for diagnosis and repair can impact the overall cost, as auto repair shops commonly charge between $80 and $150 per hour for labor. For a more accurate estimate, it's recommended to consult with a qualified mechanic or repair shop in your area.

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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 C0035:04 Code

1. What are the common symptoms of OBDII code C0035:04 (Left Front Wheel Speed Sensor Circuit Open)?

- Common symptoms include ABS warning light illuminated on the dashboard, traction control system malfunction, and potential loss of ABS functionality.

2. What could be the possible causes of OBDII code C0035:04?

- The code C0035:04 typically indicates an open circuit in the left front wheel speed sensor, which could be caused by a damaged sensor, corroded connectors, or wiring issues.

3. How can I diagnose the issue related to OBDII code C0035:04?

- Diagnosis involves visually inspecting the left front wheel speed sensor and its wiring for any visible damage, checking the connectors for corrosion, and using a multimeter to test the sensor's resistance.

4. Can I still drive my vehicle with OBDII code C0035:04 present?

- It is not recommended to drive the vehicle with this code present, as it can affect the proper functioning of the ABS system and compromise safety.

5. How can I repair OBDII code C0035:04 (Left Front Wheel Speed Sensor Circuit Open)?

- Repair involves replacing the left front wheel speed sensor if it is faulty, repairing any damaged wiring or connectors, and clearing the code with an OBDII scanner.

6. Are there any DIY tips for fixing OBDII code C0035:04?

- DIY enthusiasts with some experience in automotive repair can attempt to replace the left front wheel speed sensor themselves, following manufacturer guidelines and using proper tools.

7. Will OBDII code C0035:04 cause any other issues in my vehicle?

- In addition to affecting the ABS system, if left unresolved, this code can lead to further damage to other components of the vehicle's braking system.

8. How long does it typically take to repair OBDII code C0035:04?

- The repair time can vary depending on the extent of the damage and the accessibility of the sensor, but it usually takes around 1-2 hours for a professional mechanic to fix the issue.

9. Can extreme weather conditions contribute to triggering OBDII code C0035:04?

- Yes, extreme weather conditions like heavy rain or snow can lead to water ingress into the sensor connectors, causing corrosion and potentially triggering the code.

10. Is it necessary to reset the ABS system after repairing OBDII code C0035:04?

- Yes, it is essential to reset the ABS system using an OBDII scanner after repairing the issue to clear the code and ensure proper functionality of the system.

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