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C0396 2018 GMC Sierra Code - Range Actuator Position Sensor Circuit

Quick Answer

The C0396 diagnostic trouble code (DTC) for a 2018 GMC Sierra relates to the Range Actuator Position Sensor Circuit. Common causes include Faulty range actuator position sensor, Wiring or connector issues in the sensor circuit, ECM malfunction. 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
C0396 2018 GMC Sierra indicates Range Actuator Position Sensor Circuit.
Common causes
Common causes include Faulty range actuator position sensor, Wiring or connector issues in the sensor circuit, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 20, 2024
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Code C0396 2018 GMC Sierra Description

The C0396 diagnostic trouble code (DTC) for a 2018 GMC Sierra relates to the Range Actuator Position Sensor Circuit. This code indicates that there is a malfunction in the circuit responsible for monitoring the position of the range actuator within the vehicle's transmission system. The range actuator is a critical component that helps control the gear selection and shifting process in automatic transmissions.

OBDII Code C0396 2018 GMC Sierra - Range Actuator Position Sensor Circuit
C0396 2018 GMC Sierra Code - Range Actuator Position Sensor Circuit

Common Causes of C0396 2018 GMC Sierra

  1. Faulty range actuator position sensor
  2. Wiring or connector issues in the sensor circuit
  3. ECM malfunction
  4. Transmission fluid contamination
  5. Electrical system issues

Symptoms of C0396 2018 GMC Sierra

  1. Erratic shifting behavior
  2. Difficulty selecting gears
  3. Transmission slippage
  4. Illumination of the check engine light
  5. Reduced fuel efficiency

How to Fix C0396 2018 GMC Sierra

  1. Diagnose the specific cause of the code by using a scan tool to read the transmission system data.
  2. Inspect the range actuator position sensor and its wiring for any visible damage or corrosion.
  3. Test the sensor circuit for continuity and proper voltage levels.
  4. Replace the range actuator position sensor if it is found to be faulty.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix C0396 2018 GMC Sierra

The cost of repairing a Range Actuator Position Sensor Circuit issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, you can expect to pay between $200 and $500 for parts and labor. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops may offer more affordable pricing. It's recommended to obtain quotes from multiple repair shops to ensure you get the best deal.

What does this mean?

Tech Notes for C0396 2018 GMC Sierra

C0396:01 Range Actuator Position Sensor Circuit Low Voltage
C0396:07 Range Actuator Position Sensor Circuit High Voltage
C0396:08 Range Actuator Position Sensor Circuit Performance Signal Invalid

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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 C0396 2018 GMC Sierra Code

1. What are common symptoms of OBDII code C0396 in a 2018 GMC Sierra?

Common symptoms include erratic shifting, inability to shift gears, illuminated check engine light, and reduced vehicle performance.

2. What does the Range Actuator Position Sensor Circuit do in a 2018 GMC Sierra?

The Range Actuator Position Sensor Circuit is responsible for monitoring the position of the transmission range actuator to ensure proper gear selection and shifting.

3. What are possible causes of OBDII code C0396 in a 2018 GMC Sierra?

Possible causes include a faulty range actuator position sensor, damaged wiring or connectors in the circuit, issues with the transmission control module, or a malfunctioning transmission range actuator.

4. How can I diagnose OBDII code C0396 in my 2018 GMC Sierra?

Diagnosis involves using a scan tool to retrieve the trouble code, inspecting the wiring and connectors in the range actuator position sensor circuit, testing the sensor's resistance, and checking for proper voltage and ground connections.

5. Can I continue driving my 2018 GMC Sierra with OBDII code C0396?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further transmission issues and potentially cause damage to other components.

6. How can I repair OBDII code C0396 in my 2018 GMC Sierra?

Repair options include replacing the faulty range actuator position sensor, repairing or replacing damaged wiring or connectors, addressing issues with the transmission control module, or replacing the transmission range actuator if necessary.

7. Is it possible to reset OBDII code C0396 in a 2018 GMC Sierra without fixing the underlying issue?

While you can clear the trouble code using a scan tool, it will likely return if the root cause of the problem is not addressed. It is important to diagnose and repair the issue to prevent further complications.

8. Are there any DIY repair tips for fixing OBDII code C0396 in a 2018 GMC Sierra?

DIY enthusiasts can attempt to inspect and clean the wiring and connectors in the range actuator position sensor circuit, but for more complex issues like sensor or actuator replacement, it is recommended to seek professional help.

9. How much does it typically cost to fix OBDII code C0396 in a 2018 GMC Sierra?

The cost of repairs can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can a mechanic help me with diagnosing and repairing OBDII code C0396 in my 2018 GMC Sierra?

Yes, a qualified mechanic with experience in diagnosing and repairing transmission-related issues can help identify the root cause of the problem and perform the necessary repairs to resolve OBDII code C0396 in your GMC Sierra.

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