AutoCodes – Toyota – C1938 Toyota

C1938 Toyota Code - Malfunction In Front Active Stabilizer Control ECU Short Relay Power Supply IC

Quick Answer

The Front Active Stabilizer Control ECU consists of a metal board, control board, power source IC, step-up circuit, Electrically Erasable Programmable Read-Only Memory (EEPROM), and other parts. Common causes include Faulty Front Active Stabilizer Control ECU, Faulty Front Active Stabilizer Relay, Faulty Rear Active Stabilizer Relay. 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: C1938 Toyota indicates Malfunction In Front Active Stabilizer Control ECU Short Relay Power Supply IC.
Common causes: Common causes include Faulty Front Active Stabilizer Control ECU, Faulty Front Active Stabilizer Relay, Faulty Rear Active Stabilizer Relay.
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 828

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 Dec 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1938 Toyota Description

The Front Active Stabilizer Control ECU consists of a metal board, control board, power source IC, step-up circuit, Electrically Erasable Programmable Read-Only Memory (EEPROM), and other parts. If a problem occurs in the Front Active Stabilizer Control ECU and PIG power source circuit, a Diagnostic Trouble Code (DTC) is stored.

OBDII Code C1938 Toyota - Malfunction In Front Active Stabilizer Control ECU Short Relay Power Supply IC - AutoCodes.com — C1938 Toyota Code - Malfunction In Front Active Stabilizer Control ECU Short Relay Power Supply IC

What does this mean?

What are the Possible Causes of the DTC C1938 Toyota?

Faulty Front Active Stabilizer Control ECU
Faulty Front Active Stabilizer Relay
Faulty Rear Active Stabilizer Relay
Front Active Stabilizer Control ECU harness is open or shorted
Front Active Stabilizer Control ECU circuit poor electrical connection

How to Fix the DTC C1938 Toyota?

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 C1938 Toyota 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 C1938 Toyota code?

Need more information on how to fix the C1938 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1938 Toyota code diagnosed by a professional: Find a repair shop in your area

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 C1938 Toyota Code

1. What are the common symptoms of OBDII code C1938 in a Toyota related to the Front Active Stabilizer Control ECU Short Relay Power Supply IC malfunction?

- The common symptoms include stability control warning lights on the dashboard, issues with the vehicle's handling and stability, and possible problems with the front stabilizer system.

2. What can cause the OBDII code C1938 in a Toyota indicating a malfunction in the Front Active Stabilizer Control ECU Short Relay Power Supply IC?

- The code can be triggered by issues such as a faulty relay, wiring problems, a malfunctioning power supply IC, or a failure in the stabilizer control ECU.

3. How can I diagnose the OBDII code C1938 in my Toyota related to the Front Active Stabilizer Control ECU Short Relay Power Supply IC?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, checking the wiring and connections related to the front stabilizer system, and testing the relay and power supply IC for proper functionality.

4. What are the recommended repair tips for resolving OBDII code C1938 in a Toyota due to the Front Active Stabilizer Control ECU Short Relay Power Supply IC issue?

- Repair tips may include inspecting and repairing any damaged wiring, replacing the faulty relay or power supply IC, and resetting the system after repairs are completed.

5. Can driving with the OBDII code C1938 in a Toyota indicating a malfunction in the Front Active Stabilizer Control ECU Short Relay Power Supply IC be dangerous?

- Continuing to drive with this issue can affect the vehicle's stability and handling, potentially leading to unsafe driving conditions. It is recommended to address the problem promptly.

6. Is it possible to reset the OBDII code C1938 in a Toyota after repairing the Front Active Stabilizer Control ECU Short Relay Power Supply IC problem?

- Yes, after completing the necessary repairs, the code can be cleared using a diagnostic scanner to reset the system and turn off the warning lights on the dashboard.

7. How can I prevent the recurrence of OBDII code C1938 in my Toyota related to the Front Active Stabilizer Control ECU Short Relay Power Supply IC?

- Regularly inspecting the front stabilizer system components, maintaining proper electrical connections, and addressing any issues promptly can help prevent the code from reoccurring.

8. Are there any specific models or years of Toyota vehicles more prone to experiencing the OBDII code C1938 due to the Front Active Stabilizer Control ECU Short Relay Power Supply IC malfunction?

- While the code can potentially occur in various Toyota models with active stabilizer systems, specific years or models may exhibit a higher likelihood of experiencing this issue. It's recommended to consult with a Toyota dealership or service center for more information.

9. Can a DIY enthusiast with automotive repair knowledge fix the OBDII code C1938 issue related to the Front Active Stabilizer Control ECU Short Relay Power Supply IC?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this issue by following repair guides or manuals specific to their Toyota model. However, for complex electrical or stability control system problems, professional assistance may be necessary.

10. How much can I expect to spend on repairing the OBDII code C1938 in a Toyota caused by the Front Active Stabilizer Control ECU Short Relay Power Supply IC malfunction?

- Repair costs for this issue can vary depending on the extent of the problem, parts needed for replacement, labor rates, and whether the repair is done at a dealership or an independent repair shop. It's advisable to obtain estimates from different sources before proceeding with repairs.