AutoCodes – Generic – C0398

C0398 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 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 2,952

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 Jul 12, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0398 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 - Range Actuator Position - Range Position Correlation - AutoCodes.com — C0398 Code - Range Actuator Position - Range Position Correlation

What does this mean?

What are the Possible Causes of the DTC C0398?

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?

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 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 code?

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

Need Help with the Code?

Get the C0398 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0398 Buick — Range Actuator Position - Range Position Correlation
C0398 Cadillac — Range Actuator Position - Range Position Correlation
C0398 Chevrolet — Range Actuator Position - Range Position Correlation
C0398 GMC — Range Actuator Position - Range Position Correlation

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 Code

1. What are the common symptoms of OBDII code C0398?

- Common symptoms include erratic shifting, difficulty changing gears, and illuminated warning lights on the dashboard related to the transmission system.

2. What causes the OBDII code C0398 to be triggered?

- The code C0398 is often triggered by issues with the range actuator position sensor or a correlation error between the range actuator position and range position.

3. How can I diagnose the OBDII code C0398?

- Diagnosing code C0398 typically involves using a professional OBDII scanner to read the code and performing a thorough inspection of the range actuator position sensor and related components.

4. What are the possible repair options for OBDII code C0398?

- Repair options for code C0398 may include replacing the faulty range actuator position sensor, recalibrating the sensor, checking and adjusting the linkage, or addressing any wiring issues.

5. Can I drive my vehicle with OBDII code C0398?

- It is not recommended to drive your vehicle with code C0398 as it can lead to further transmission problems and potentially unsafe driving conditions. It is best to address the issue promptly.

6. How much does it typically cost to repair OBDII code C0398?

- The cost of repairing code C0398 can vary depending on the underlying cause, parts needed for replacement, and labor costs. It is advisable to consult a professional mechanic for an accurate estimate.

7. Is it possible to reset the OBDII code C0398 without repairing the issue?

- While clearing the code temporarily may turn off the warning light, the underlying issue causing code C0398 will persist. It is crucial to address the root cause to prevent further problems.

8. Are there any preventive maintenance tips to avoid OBDII code C0398 in the future?

- Regularly servicing and inspecting the transmission system, including the range actuator position sensor, can help prevent issues that may trigger code C0398. Following the manufacturer's maintenance schedule is also recommended.

9. Can a DIY enthusiast repair OBDII code C0398 at home?

- Repairing code C0398 may require specialized tools and knowledge of the transmission system, making it a complex task for DIY enthusiasts. It is best to seek assistance from a professional mechanic for proper diagnosis and repair.

10. How long does it take to repair OBDII code C0398?

- The time to repair code C0398 can vary based on the extent of the issue, availability of parts, and the expertise of the mechanic. In some cases, it can be resolved within a few hours, while more complex issues may take longer to address.