AutoCodes – Chevrolet – C0300 Chevrolet

C0300 Chevrolet Code - Rear Propshaft Speed Sensor

Quick Answer

The rear propshaft speed sensor is a Permanent Magnet (PM) generator. Common causes include Faulty Rear Propshaft Speed Sensor, Rear Propshaft Speed Sensor harness is open or shorted, Rear Propshaft 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: C0300 Chevrolet indicates Rear Propshaft Speed Sensor.
Common causes: Common causes include Faulty Rear Propshaft Speed Sensor, Rear Propshaft Speed Sensor harness is open or shorted, Rear Propshaft 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 35,211

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 Jun 18, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C0300 Chevrolet Description

The rear propshaft speed sensor is a Permanent Magnet (PM) generator. The PM generator produces a pulsing AC voltage. The AC voltage level and number of pulses increases as speed increases. The module converts the pulsating AC voltage to a propshaft RPM which is used for calculations. The propshaft RPM can be displayed with a scan tool.
This DTC detects an open, short to ground, short to voltage or faulty sensor.

OBDII Code C0300 Chevrolet - Rear Propshaft Speed Sensor - AutoCodes.com — C0300 Chevrolet Code - Rear Propshaft Speed Sensor

What does this mean?

What are the Possible Causes of the DTC C0300 Chevrolet?

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

How to Fix the DTC C0300 Chevrolet?

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 does this mean?

Code Tech Notes

There is factory service bulletin for the C0300 code. The factory recommends reprogramming the Transfer Case Control Module (TCCOM) to fix the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0300 Chevrolet 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 C0300 Chevrolet code?

Need more information on how to fix the C0300 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0300 Chevrolet 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 C0300 Chevrolet Code

1. What are the common symptoms of OBDII code C0300 in a Chevrolet related to the Rear Propshaft Speed Sensor?

The common symptoms include issues with the vehicle's stability control system, ABS system, and potential traction control problems.

2. What are the typical causes of OBDII code C0300 in a Chevrolet?

The code C0300 is often triggered by a faulty rear propshaft speed sensor, damaged wiring or connectors, or issues with the sensor's mounting.

3. How can I diagnose the Rear Propshaft Speed Sensor in a Chevrolet when OBDII code C0300 is present?

Diagnosing involves checking the sensor's wiring and connectors for damage, testing the sensor's functionality, and inspecting its mounting position for proper alignment.

4. Can a DIY enthusiast replace the Rear Propshaft Speed Sensor in a Chevrolet to resolve OBDII code C0300?

Yes, replacing the sensor is a task that can be done by a DIY enthusiast with moderate mechanical skills using basic tools and following proper safety precautions.

5. Are there any tips to consider when replacing the Rear Propshaft Speed Sensor in a Chevrolet to fix OBDII code C0300?

Ensure the vehicle is safely lifted and supported, disconnect the battery before starting work, and follow the manufacturer's guidelines for sensor replacement and recalibration.

6. Will driving with OBDII code C0300 related to the Rear Propshaft Speed Sensor affect the overall performance of my Chevrolet?

Driving with this code present may impact the vehicle's stability control, ABS functionality, and traction control systems, potentially affecting overall performance and safety.

7. How urgent is it to address OBDII code C0300 linked to the Rear Propshaft Speed Sensor in a Chevrolet?

It's recommended to address this code promptly to prevent further issues with the vehicle's stability and safety systems that rely on the propshaft speed sensor data.

8. Can a malfunctioning Rear Propshaft Speed Sensor triggering OBDII code C0300 cause any long-term damage to my Chevrolet?

Continued driving with a faulty sensor can potentially cause further damage to the vehicle's stability control components and affect overall drivability if left unresolved.

9. Is it necessary to clear the OBDII code C0300 after replacing the Rear Propshaft Speed Sensor in a Chevrolet?

After replacing the sensor, it's advisable to clear the code using an OBDII scanner to reset the system and ensure that the repair was successful.

10. How can I prevent future occurrences of OBDII code C0300 in my Chevrolet related to the Rear Propshaft Speed Sensor?

Regularly inspecting the sensor and its wiring for damage, ensuring proper mounting alignment, and addressing any issues promptly can help prevent future instances of this code.