AutoCodes – GMC – C0047 GMC

C0047 GMC Code - Left Rear Wheel Speed Sensor Circuit Low

Quick Answer

The Wheel Speed Sensor (WSS) receives ignition voltage from the Electronic Brake Control Module (EBCM) and provides a DC square wave signal back to the module. Common causes include Faulty Left Rear Wheel Speed Sensor, Left Rear Wheel Speed Sensor harness is open or shorted, Left Rear 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: C0047 GMC indicates Left Rear Wheel Speed Sensor Circuit Low.
Common causes: Common causes include Faulty Left Rear Wheel Speed Sensor, Left Rear Wheel Speed Sensor harness is open or shorted, Left Rear 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 2,655

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 Oct 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0047 GMC Description

The Wheel Speed Sensor (WSS) receives ignition voltage from the Electronic Brake Control Module (EBCM) and provides a DC square wave signal back to the module. As the wheel spins, the EBCM uses the frequency of the square wave signal to calculate the wheel speed.

OBDII Code C0047 GMC - Left Rear Wheel Speed Sensor Circuit Low - AutoCodes.com — C0047 GMC Code - Left Rear Wheel Speed Sensor Circuit Low

What does this mean?

What are the Possible Causes of the DTC C0047 GMC?

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

How to Fix the DTC C0047 GMC?

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 C0047 GMC 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 C0047 GMC code?

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Need Help with the Code?

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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 C0047 GMC Code

1. What are the common symptoms of OBDII code C0047 GMC (Left Rear Wheel Speed Sensor Circuit Low)?

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

2. What are the possible causes of the C0047 GMC code?

Possible causes may include a faulty left rear wheel speed sensor, damaged sensor wiring or connectors, wheel speed sensor ring damage, or issues with the ABS module.

3. How can I diagnose the cause of the C0047 GMC code?

Diagnosis typically involves visually inspecting the sensor and wiring for damage, checking the sensor's resistance with a multimeter, and performing a scan tool test to monitor wheel speed sensor data.

4. What are some repair tips for resolving the C0047 GMC code?

Repair tips may include cleaning the sensor mounting surface, repairing or replacing damaged wiring or connectors, replacing the faulty wheel speed sensor, and ensuring proper installation and calibration.

5. Can I drive my vehicle with the C0047 GMC code present?

It is not recommended to drive with this code present, as it may affect the proper functioning of the ABS and stability control systems, potentially compromising vehicle safety.

6. How do I reset the C0047 GMC code after making repairs?

After addressing the underlying issue, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the stored fault codes.

7. Will the C0047 GMC code cause any damage to my vehicle if left unresolved?

Leaving the code unresolved may lead to further issues with the ABS and stability control systems, potentially affecting the vehicle's braking performance and overall safety.

8. Is it possible for the C0047 GMC code to reappear after repairs have been made?

If the root cause of the code was not properly addressed, or if there are underlying issues with the ABS system, the code may reappear even after repairs.

9. Do I need specialized tools to fix the C0047 GMC code myself?

While basic tools like a multimeter and OBDII scanner can be helpful for diagnosis and resetting the code, specialized tools may be required for more in-depth troubleshooting and repairs.

10. How can I prevent the C0047 GMC code from recurring in the future?

Regularly inspecting and maintaining the wheel speed sensors, sensor wiring, and ABS system components can help prevent the recurrence of the C0047 code.