AutoCodes – Hyundai – C1202 Hyundai

C1202 Hyundai Code - Front Left Wheel Speed Sensor Invalid Or No Signal

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: C1202 Hyundai indicates Front Left Wheel Speed Sensor Invalid Or No Signal.
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 10,062

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
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1202 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 there is no wheel speed signal within 10ms to 20ms at a vehicle speed > 43.2 km/h (26.8 mph) or a deviation between sensors exceed the threshold or one or two wheels are at 2.75 km/h (1.7 mph) while the vehicle speed is at 12 km/h (7.5 mph). 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 (7.5 mph).

OBDII Code C1202 Hyundai - Front Left Wheel Speed Sensor Invalid Or No Signal - AutoCodes.com — C1202 Hyundai Code - Front Left Wheel Speed Sensor Invalid Or No Signal

What does this mean?

What are the Possible Causes of the DTC C1202 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 C1202 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 C1202 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 C1202 Hyundai Code

1. What are the common symptoms of OBDII code C1202 on a Hyundai related to the front left wheel speed sensor?

The common symptoms include ABS warning light illuminated on the dashboard, traction control system malfunction, and potential loss of stability control.

2. What typically causes the OBDII code C1202 in a Hyundai, indicating an invalid or no signal from the front left wheel speed sensor?

Common causes include a faulty front left wheel speed sensor, damaged wiring or connectors leading to the sensor, or issues with the ABS module.

3. How can I diagnose the front left wheel speed sensor to confirm it is the cause of OBDII code C1202 on my Hyundai?

You can use a multimeter to test the sensor's resistance, inspect the sensor and its wiring for physical damage, or conduct a scan tool test to monitor the sensor's output while driving.

4. What are some repair tips for resolving the OBDII code C1202 on a Hyundai due to issues with the front left wheel speed sensor?

Try cleaning the sensor and its mounting area, ensure proper sensor alignment during installation, and perform a reset using a scan tool after replacing the sensor if needed.

5. Can a DIY enthusiast with basic automotive knowledge fix the OBDII code C1202 related to the front left wheel speed sensor on a Hyundai?

Yes, replacing the front left wheel speed sensor is a task that can often be done by DIY enthusiasts with basic tools and some mechanical experience.

6. Are there any safety concerns associated with driving a Hyundai when OBDII code C1202 is triggered by the front left wheel speed sensor issue?

While the vehicle should still be operational, driving with the ABS warning light on may compromise the effectiveness of the anti-lock braking system and other stability control features.

7. How urgent is it to address the OBDII code C1202 on a Hyundai caused by the front left wheel speed sensor?

It is recommended to address the issue promptly to ensure the proper functioning of the ABS and traction control systems, especially in adverse driving conditions where stability control is crucial.

8. Will resetting the OBDII code C1202 related to the front left wheel speed sensor on a Hyundai resolve the underlying issue?

Resetting the code may temporarily clear the warning light, but if the root cause, such as a faulty sensor or wiring, persists, the code is likely to reappear.

9. Can extreme weather conditions or road debris impact the performance of the front left wheel speed sensor, triggering OBDII code C1202 on a Hyundai?

Yes, harsh weather conditions or debris accumulation around the sensor can affect its performance, leading to signal irregularities and the triggering of the OBDII code.

10. Is it advisable to seek professional help if unable to diagnose or repair the OBDII code C1202 linked to the front left wheel speed sensor on a Hyundai?

If you encounter difficulties diagnosing or fixing the issue, it's recommended to consult a qualified mechanic or Hyundai dealership to ensure accurate diagnosis and proper repair of the sensor problem.