C1223 GMC Code - Left Rear Wheel Speed Sensor Input Signal Is Zero
Quick Answer
As the wheel spins, the wheel speed sensor produces an AC signal. Common causes include Faulty Hub Assembly (Left Rear Wheel Speed Sensor is part of hub assembly), Faulty Left Rear Wheel Speed Sensor, Left Rear Wheel Speed Sensor harness is open or shorted. 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
- C1223 GMC indicates Left Rear Wheel Speed Sensor Input Signal Is Zero.
- Common causes
- Common causes include Faulty Hub Assembly (Left Rear Wheel Speed Sensor is part of hub assembly), Faulty Left Rear Wheel Speed Sensor, Left Rear Wheel Speed Sensor harness is open or shorted.
- 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.
Code C1223 GMC Description
What are the Possible Causes of the DTC C1223 GMC?
- Faulty Hub Assembly (Left Rear Wheel Speed Sensor is part of hub assembly)
- 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 C1223 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 C1223 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.
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Frequently Asked Questions about C1223 GMC Code
1. What are the common symptoms of OBDII code C1223 on a GMC vehicle?
The common symptoms include the ABS warning light illuminating on the dashboard, traction control system malfunctions, and potential issues with the vehicle's stability control.
2. What can cause the OBDII code C1223 indicating "Left Rear Wheel Speed Sensor Input Signal Is Zero" on a GMC?
Possible causes include a faulty left rear wheel speed sensor, damaged wiring or connectors leading to the sensor, or issues with the ABS module.
3. How can I diagnose the OBDII code C1223 related to the left rear wheel speed sensor on my GMC?
Diagnosis involves visually inspecting the sensor and its wiring, testing the sensor's signal with a multimeter, and using a scan tool to monitor the sensor's data while driving.
4. Is it safe to drive with the OBDII code C1223 triggered on a GMC due to the left rear wheel speed sensor issue?
It is not recommended to drive the vehicle with this code active, as it may affect the proper functioning of important safety systems like ABS and stability control.
5. Can I repair the OBDII code C1223 caused by the left rear wheel speed sensor issue myself?
If you have experience with automotive repairs and diagnostics, you may be able to replace the left rear wheel speed sensor or repair damaged wiring yourself. However, professional help is recommended for accurate diagnosis and repair.
6. How much does it typically cost to fix the OBDII code C1223 related to the left rear wheel speed sensor on a GMC?
The cost can vary depending on the specific issue, but it may involve replacing the sensor, repairing wiring, or addressing problems with the ABS module. Costs can range from around $100 to $500 or more.
7. What are some tips to prevent the recurrence of the OBDII code C1223 on a GMC after repair?
Ensure proper installation of the new wheel speed sensor, securely connect all wiring, and regularly inspect the ABS system for any signs of damage or malfunction.
8. Will resetting the OBDII code C1223 on a GMC temporarily resolve the issue with the left rear wheel speed sensor?
Resetting the code may temporarily turn off the warning light, but if the underlying issue with the left rear wheel speed sensor persists, the code is likely to reappear.
9. Can extreme weather conditions affect the performance of the left rear wheel speed sensor and trigger the OBDII code C1223 on a GMC?
Yes, extreme temperatures or exposure to moisture can impact the sensor's functionality and lead to the signal being interpreted as zero, triggering the C1223 code.
10. How important is it to address the OBDII code C1223 related to the left rear wheel speed sensor promptly on a GMC?
It is crucial to address this issue promptly, as it directly affects the proper operation of ABS, traction control, and stability control systems, which are essential for safe driving.
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