AutoCodes – Hyundai – C1201 Hyundai

C1201 Hyundai Code - Front Left Wheel Speed Sensor Range Or Performance

Quick Answer

The Wheel Speed Sensor is the essential component the Anti-Lock Brake System (ABS) ECU uses to calculate vehicle speed and to determine whether wheel lock occurs. Common causes include Improper installation of wheel speed sensor, Abnormal Rotor and wheel bearing, Faulty Front Left Wheel Speed Sensor. 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: C1201 Hyundai indicates Front Left Wheel Speed Sensor Range Or Performance.
Common causes: Common causes include Improper installation of wheel speed sensor, Abnormal Rotor and wheel bearing, Faulty Front Left Wheel Speed Sensor.
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.

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Code Popularity 7,505

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 21, 2021

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1201 Hyundai Description

The Wheel Speed Sensor is the essential component the Anti-Lock Brake System (ABS) ECU uses to calculate vehicle speed and to determine whether wheel lock occurs. For example, a rear-wheel speed signal is used as a reference value, for vehicle speed, in front-wheel drive vehicles, and if a difference between the front and rear wheel speed occurs, then ABS control is performed. The wheel speed sensor generates sinewave signals, based on a magnetic field made by a permanent magnet in the speed sensor when the tone wheel rotates. The ABS ECU monitors the wheel speed sensor signal continuously. This code is set when an abnormal signal due to an air gap problem or an abnormal speed change ratio is detected at the vehicle speed between 10 km/h to 80 km/h(6.2mph to 49.7mph). The warning lamp is turned OFF unless additional faults are detected when the IG KEY has turned ON again, and wheel speed is more than 12 Km/h(7.5mph).

OBDII Code C1201 Hyundai - Front Left Wheel Speed Sensor Range Or Performance - AutoCodes.com — C1201 Hyundai Code - Front Left Wheel Speed Sensor Range Or Performance

What does this mean?

What are the Possible Causes of the DTC C1201 Hyundai?

Improper installation of wheel speed sensor
Abnormal Rotor and wheel bearing
Faulty Front Left Wheel Speed Sensor
Front Left Wheel Speed Sensor harness is open or shorted
Front Left Wheel Speed Sensor circuit poor electrical connection

How to Fix the DTC C1201 Hyundai?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1201 Hyundai 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 C1201 Hyundai Code

1. What does the OBDII code C1201 mean on a Hyundai?

C1201 indicates an issue with the front left wheel speed sensor, specifically a range or performance problem, meaning the sensor is not providing proper data to the ABS or stability control system.

2. What are the symptoms of a C1201 code in a Hyundai?

Common symptoms include the ABS warning light or traction control light illuminating, loss of ABS functionality, and potentially erratic braking or stability issues.

3. What causes the C1201 code to appear?

Causes can include a faulty front left wheel speed sensor, damaged wiring or connectors, a dirty or misaligned sensor, or a problem with the wheel hub or reluctor ring.

4. Can I drive my Hyundai with a C1201 code?

While the vehicle may still be drivable, the ABS and traction control systems may be disabled, increasing the risk of skidding or loss of control in certain conditions.

5. How do you diagnose the C1201 code on a Hyundai?

Diagnosis typically involves scanning for codes, inspecting the front left wheel speed sensor and its wiring, checking the reluctor ring for damage or debris, and testing the sensorâ€™s output with a multimeter.

6. How do you fix a C1201 code on a Hyundai?

Repairs may include replacing the front left wheel speed sensor, repairing or replacing damaged wiring or connectors, cleaning the sensor, or replacing the wheel hub or reluctor ring if necessary.

7. How much does it cost to fix a C1201 code on a Hyundai?

The cost can vary, but replacing a wheel speed sensor typically ranges from $100 to $300, including parts and labor. Wiring repairs or other components may increase costs.

8. Can a dirty wheel speed sensor cause a C1201 code?

Yes, dirt, debris, or corrosion on the sensor or reluctor ring can interfere with proper readings and trigger the C1201 code.

9. Will clearing the C1201 code fix the issue?

Clearing the code alone will not fix the root cause. The underlying issue with the sensor or related components must be addressed to prevent the code from returning.

10. How can I prevent the C1201 code from occurring again?

Regular maintenance, such as cleaning the wheel speed sensors and inspecting the wiring and connectors for damage, can help prevent this issue from recurring.