AutoCodes – Generic – C1624

C1624 Code - AWC-ECU System Internal Malfunction

Quick Answer

The All Wheel Control (AWC) ECU monitors the malfunction in the ECU. Common causes include Faulty All Wheel Control (AWC) ECU, All Wheel Control (AWC) ECU harness is open or shorted, All Wheel Control (AWC) ECU 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: C1624 indicates AWC-ECU System Internal Malfunction.
Common causes: Common causes include Faulty All Wheel Control (AWC) ECU, All Wheel Control (AWC) ECU harness is open or shorted, All Wheel Control (AWC) ECU 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 1,876

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 Nov 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1624 Description

The All Wheel Control (AWC) ECU monitors the malfunction in the ECU. The code is set when a malfunction is found in AWC-ECU.

OBDII Code C1624 - AWC-ECU System Internal Malfunction - AutoCodes.com — C1624 Code - AWC-ECU System Internal Malfunction

What does this mean?

What are the Possible Causes of the DTC C1624?

Faulty All Wheel Control (AWC) ECU
All Wheel Control (AWC) ECU harness is open or shorted
All Wheel Control (AWC) ECU circuit poor electrical connection

How to Fix the DTC C1624?

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 C1624 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 C1624 code?

Need more information on how to fix the C1624 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1624 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1624 Mitsubishi — AWC-ECU System Internal Malfunction

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 C1624 Code

1. What does the OBDII code C1624 mean?

C1624 indicates an "AWC-ECU System Internal Malfunction," which refers to an issue within the All-Wheel Control Electronic Control Unit (AWC-ECU) in vehicles equipped with all-wheel-drive systems.

2. What are the common symptoms of code C1624?

Common symptoms include the all-wheel-drive system becoming inoperative, warning lights such as the AWC/4WD light illuminating on the dashboard, and potential loss of traction or stability control functions.

3. What causes the C1624 code to appear?

The causes may include internal failure of the AWC-ECU, software glitches, damaged wiring or connectors, or communication errors between the AWC-ECU and other control modules.

4. Can I still drive my vehicle with the C1624 code present?

While the vehicle may still be drivable, the all-wheel-drive system may not function properly, potentially reducing traction and stability in adverse driving conditions.

5. How is the C1624 code diagnosed?

Diagnosis involves scanning the vehicle for codes, inspecting the AWC-ECU and its wiring, checking for software updates, and testing the communication between the AWC-ECU and related modules using specialized tools.

6. What repairs are needed to fix the C1624 code?

Repairs may include replacing the AWC-ECU if it's faulty, repairing or replacing damaged wiring or connectors, or updating the ECU software if a bug is identified.

7. How much does it cost to fix the C1624 code?

The cost varies depending on the exact issue, but replacing the AWC-ECU can range from $500 to $1,200, excluding labor, while wiring repairs may be less expensive.

8. Can clearing the C1624 code fix the problem?

Clearing the code may temporarily reset the system, but if the underlying issue isn't addressed, the code will likely reappear.

9. Is the C1624 code related to other OBDII codes?

Yes, it may appear alongside other codes related to the all-wheel-drive system or communication errors, which can help pinpoint the root cause.

10. Can a software update resolve the C1624 code?

In some cases, a software update for the AWC-ECU can fix the issue if it's caused by a known glitch or bug, but this should be confirmed by a professional diagnosis.