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Engine-Codes – GMC – C039E 2018 GMC Sierra

C039E 2018 GMC Sierra Code - Range Actuator Position Sensor Direction Signal Circuit

Quick Answer

The C039E diagnostic trouble code (DTC) specifically refers to a fault in the Range Actuator Position Sensor Direction Signal Circuit in a 2018 GMC Sierra. Common causes include Faulty Range Actuator Position Sensor, Damaged wiring or connectors in the signal circuit, Corrosion or debris affecting sensor operation. 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
C039E 2018 GMC Sierra indicates Range Actuator Position Sensor Direction Signal Circuit.
Common causes
Common causes include Faulty Range Actuator Position Sensor, Damaged wiring or connectors in the signal circuit, Corrosion or debris affecting sensor operation.
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 Sep 17, 2024
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Code C039E 2018 GMC Sierra Description

The C039E diagnostic trouble code (DTC) specifically refers to a fault in the Range Actuator Position Sensor Direction Signal Circuit in a 2018 GMC Sierra. This sensor is responsible for monitoring the position of the range actuator in the vehicle's transmission system. The range actuator is a crucial component that helps control the gear selection in automatic transmissions. The sensor sends signals to the vehicle's engine control module (ECM) to ensure smooth shifting between gears.

OBDII Code C039E 2018 GMC Sierra - Range Actuator Position Sensor Direction Signal Circuit
C039E 2018 GMC Sierra Code - Range Actuator Position Sensor Direction Signal Circuit

Common Causes of C039E 2018 GMC Sierra

  1. Faulty Range Actuator Position Sensor
  2. Damaged wiring or connectors in the signal circuit
  3. Corrosion or debris affecting sensor operation
  4. ECM software issues
  5. Mechanical issues within the transmission system

Symptoms of C039E 2018 GMC Sierra

  1. Rough or delayed shifting between gears
  2. Transmission slipping or jerking during acceleration
  3. Inability to shift gears properly
  4. Illumination of the Check Engine Light
  5. Reduced fuel efficiency

How to Fix C039E 2018 GMC Sierra

  1. Begin by conducting a thorough inspection of the Range Actuator Position Sensor and its wiring for any visible damage or corrosion.
  2. Test the sensor using a multimeter to check for proper voltage and resistance readings.
  3. Replace the sensor if it is found to be faulty, ensuring proper installation and calibration.
  4. Check and repair any damaged wiring or connectors in the signal circuit.
  5. Clear the DTC from the vehicle's ECM memory and perform a test drive to ensure proper shifting operation.

Cost to Fix C039E 2018 GMC Sierra

The cost of repairing a Range Actuator Position Sensor Direction Signal Circuit issue can vary depending on the extent of the damage and the specific parts needed for replacement. On average, the cost of parts for this repair can range from $100 to $300, while labor costs can range from $150 to $400. Overall, the total repair cost can be estimated to be between $250 and $700. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and labor rates at auto repair shops. It's recommended to obtain quotes from local shops for a more accurate cost estimate.

What does this mean?

Tech Notes for C039E 2018 GMC Sierra

C039E:03 Range Actuator Position Sensor Direction Signal Circuit Low Voltage

C039E:07 Range Actuator Position Sensor Direction Signal Circuit High Voltage

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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 C039E 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code C039E in a 2018 GMC Sierra?

The common symptoms include issues with the range actuator position sensor, such as erratic shifting, trouble engaging gears, and potential transmission problems.

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

The Range Actuator Position Sensor Direction Signal Circuit is responsible for providing feedback on the position of the range actuator in the transmission, aiding in proper gear selection and shifting.

3. What are the possible causes of OBDII code C039E in a 2018 GMC Sierra?

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

4. How can I diagnose OBDII code C039E in my 2018 GMC Sierra?

Diagnosis typically involves using a diagnostic scanner to retrieve the trouble codes, checking the wiring and connectors related to the range actuator position sensor, and testing the sensor itself for proper function.

5. Can I continue driving my 2018 GMC Sierra with OBDII code C039E?

It is not recommended to continue driving the vehicle with this code present, as it may lead to further transmission issues and potential safety hazards on the road.

6. How can I repair OBDII code C039E in my 2018 GMC Sierra?

Repair options may include replacing the range actuator position sensor, repairing damaged wiring or connectors, or reprogramming the transmission control module as necessary.

7. Is it safe to clear the OBDII code C039E in my 2018 GMC Sierra without fixing the underlying issue?

Clearing the code without addressing the root cause may temporarily turn off the check engine light, but the problem will likely resurface, leading to potential transmission issues down the line.

8. Can a DIY enthusiast fix OBDII code C039E in a 2018 GMC Sierra?

While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing this code may require specialized tools and knowledge best handled by a professional mechanic.

9. How much can I expect to pay to fix OBDII code C039E in my 2018 GMC Sierra?

The cost of repairs can vary depending on the extent of the issue and whether you choose to address it yourself or take it to a professional. Costs may include parts, labor, and diagnostic fees.

10. How can I prevent OBDII code C039E from occurring in my 2018 GMC Sierra in the future?

Regular maintenance, such as checking and replacing transmission fluid as recommended, inspecting wiring for damage, and addressing any related issues promptly, can help prevent the recurrence of this code.

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