AutoCodes – Chevrolet – C0398 2018 Chevrolet Silverado

C0398 2018 Chevrolet Silverado Code - Range Actuator Position - Range Position Correlation

Quick Answer

The Transfer Case Control Module always monitors the Gear Position Sensor signal circuit and the Transfer Case Range Actuator Position Sensor signal circuit. Common causes include Faulty Transfer Case Range Actuator Position Sensor, Transfer Case Range Actuator Position Sensor harness is open or shorted, Transfer Case Range Actuator Position 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: C0398 2018 Chevrolet Silverado indicates Range Actuator Position - Range Position Correlation.
Common causes: Common causes include Faulty Transfer Case Range Actuator Position Sensor, Transfer Case Range Actuator Position Sensor harness is open or shorted, Transfer Case Range Actuator Position 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 335

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jul 12, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0398 2018 Chevrolet Silverado Description

The Transfer Case Control Module always monitors the Gear Position Sensor signal circuit and the Transfer Case Range Actuator Position Sensor signal circuit. The signal voltage values are converted to degrees to determine the position of the transfer case. The Transfer Case Control Module continuously compares the position of the Transfer Case Range Actuator Position Sensor to that of the Gear Position Sensor. If the positions do not match within a pre-determined range, it is considered an error and a fault is set. The Transfer Case Range Actuator Position Sensor is a higher resolution sensor and is more accurate but requires the Gear Position Sensor for correlation check at ignition ON and during transfer case range changes. The Diagnostic Trouble Code (DTC) will be set when the Range Actuator Position Sensor and the Range Position Sensor are both showing valid positions but differ by greater than a predetermined amount when no range change is in progress. The Transfer Case Range Actuator Position Sensor, also known as the incremental position sensor, is part of the Transfer Case Motor. The Gear Position Sensor, also known as the Transfer Case Range Actuator Position Sensor, the Two/Four Wheel Drive Actuator Position Sensor, or the rotational position sensor.

OBDII Code C0398 2018 Chevrolet Silverado - Range Actuator Position - Range Position Correlation - AutoCodes.com — C0398 2018 Chevrolet Silverado Code - Range Actuator Position - Range Position Correlation

What does this mean?

What are the Possible Causes of the DTC C0398 2018 Chevrolet Silverado?

Faulty Transfer Case Range Actuator Position Sensor
Transfer Case Range Actuator Position Sensor harness is open or shorted
Transfer Case Range Actuator Position Sensor circuit poor electrical connection
Faulty Transfer Case Range Actuator Position Sensor (part of the Transfer Case Motor or Transfer Case Two/Four Wheel Drive Actuator)
Faulty Transfer Case Control Module

How to Fix the DTC C0398 2018 Chevrolet Silverado?

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 C0398 2018 Chevrolet Silverado 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 C0398 2018 Chevrolet Silverado code?

Need more information on how to fix the C0398 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 C0398 2018 Chevrolet Silverado Code

1. What does the OBDII code C0398 mean on a 2018 Chevrolet Silverado?

The C0398 code indicates an issue with the Range Actuator Position - Range Position Correlation, which means the system is detecting a mismatch between the actuator's position and the range selection.

2. What are common symptoms of a C0398 code on a 2018 Chevy Silverado?

Common symptoms include erratic shifting, the vehicle stuck in a specific gear, a check engine light, or a Service 4WD message on the dashboard.

3. What causes the C0398 code to appear on a 2018 Chevrolet Silverado?

Possible causes include a faulty range actuator, damaged wiring or connectors in the transfer case circuit, a misaligned actuator, or a failed transfer case control module (TCCM).

4. Can driving with a C0398 code damage my 2018 Silverado?

Driving with this code can lead to further damage to the transfer case or drivetrain components if not addressed promptly, especially if improper shifting occurs.

5. How do I diagnose the C0398 code on my Chevrolet Silverado?

Start by scanning for codes with an OBDII scanner, inspecting the wiring and connectors to the transfer case actuator, and checking the actuator's alignment and functionality.

6. How can I fix the C0398 code on a 2018 Chevy Silverado?

Repairs may include replacing the range actuator, repairing damaged wiring, ensuring proper alignment of the actuator, or reprogramming/replacing the transfer case control module.

7. Is the range actuator the same as the transfer case motor?

Yes, the range actuator is often referred to as the transfer case motor and is responsible for shifting between 2WD, 4WD, and other drive ranges.

8. How much does it cost to fix a C0398 code on a Chevrolet Silverado?

Repair costs can vary, with actuator replacement ranging from $200 to $400 for parts and labor, or more if additional components like the TCCM need replacement.

9. Can a low battery cause the C0398 code to trigger?

Yes, a weak or low battery can cause voltage issues that affect the transfer case actuator and lead to this code.

10. Do I need to reprogram anything after fixing the C0398 code?

In some cases, reprogramming of the transfer case control module or recalibration of the actuator may be required to clear the code and restore proper function.