AutoCodes – Cadillac – C0502 Cadillac

C0502 Cadillac Code - Left Front Wheel Speed Sensor Circuit Low

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Left Front Wheel Speed Sensor. Common causes include Faulty Left Front Wheel Speed Sensor, Left Front Wheel Speed Sensor harness is open or shorted, Left Front Wheel Speed Sensor circuit poor electrical connection. 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: C0502 Cadillac indicates Left Front Wheel Speed Sensor Circuit Low.
Common causes: Common causes include Faulty Left Front Wheel Speed Sensor, Left Front Wheel Speed Sensor harness is open or shorted, Left Front Wheel Speed Sensor circuit poor electrical connection.
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 791

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0502 Cadillac Description

The Anti-Lock Brake System (ABS) Module monitors the Left Front Wheel Speed Sensor. The ABS Module sets the OBDII code when the Left Front Wheel Speed Sensor is not to factory specifications.

OBDII Code C0502 Cadillac - Left Front Wheel Speed Sensor Circuit Low - AutoCodes.com — C0502 Cadillac Code - Left Front Wheel Speed Sensor Circuit Low

What does this mean?

What are the Possible Causes of the DTC C0502 Cadillac?

Faulty Left Front Wheel Speed Sensor
Left Front Wheel Speed Sensor harness is open or shorted
Left Front Wheel Speed Sensor circuit poor electrical connection

How to Fix the DTC C0502 Cadillac?

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 C0502 Cadillac 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.

Need more information about the C0502 Cadillac code?

Need more information on how to fix the C0502 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0502 Cadillac code diagnosed by a professional: Find a repair shop in your area

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 C0502 Cadillac Code

What does OBDII code C0502 mean for a Cadillac?

OBDII code C0502 indicates a problem with the left front wheel speed sensor circuit, specifically that it is reading low voltage or a short circuit.

What are the common symptoms of a C0502 code?

Common symptoms include the ABS warning light illuminating on the dashboard, erratic ABS performance, and potential issues with traction control.

What could cause the C0502 code to trigger?

The C0502 code can be triggered by a faulty left front wheel speed sensor, damaged wiring or connectors, or issues with the ABS control module.

How can I diagnose the C0502 code?

To diagnose the C0502 code, start by visually inspecting the left front wheel speed sensor and its wiring for damage, then use a multimeter to test the sensor's resistance and voltage.

Can a dirty wheel speed sensor cause a C0502 code?

Yes, dirt or debris on the wheel speed sensor can interfere with its operation, potentially leading to a C0502 code.

What is the typical repair for a C0502 code?

Repairing a C0502 code usually involves replacing the left front wheel speed sensor or repairing any damaged wiring or connectors associated with it.

Is it safe to drive a car with a C0502 code?

While it may be safe to drive short distances, it's not advisable to ignore the C0502 code as it can affect ABS and traction control systems, leading to reduced vehicle safety.

How much does it typically cost to fix a C0502 code?

The cost to repair a C0502 code can vary widely depending on labor rates and parts, but expect to pay anywhere from $100 to $300 for a sensor replacement.

Will clearing the C0502 code fix the issue?

Clearing the C0502 code will not fix the underlying issue; it may temporarily turn off the warning light, but the problem will likely return if not addressed.