C1938 Lexus 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 Lexus 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.
Code C1938 Lexus Description
What are the Possible Causes of the DTC C1938 Lexus?
- 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 Lexus?
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 Lexus 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.
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Frequently Asked Questions about C1938 Lexus Code
1. What are the common symptoms of OBDII code C1938 in a Lexus related to the Front Active Stabilizer Control ECU Short Relay Power Supply IC malfunction?
- Common symptoms include stability control issues, illuminated warning lights on the dashboard, and potential loss of control while driving.
2. What are the possible causes of the C1938 code in a Lexus?
- The code C1938 can be triggered by a malfunction in the front active stabilizer control ECU, a short in the relay power supply IC, or wiring/connectivity issues.
3. How can I diagnose the C1938 code in my Lexus?
- Diagnosing the C1938 code typically involves using an OBDII scanner to retrieve the specific fault code, followed by a detailed inspection of the front active stabilizer control ECU, relay power supply IC, and related wiring.
4. Is it safe to drive my Lexus with the C1938 code triggered?
- It is not recommended to drive your Lexus with the C1938 code triggered, as it can lead to stability control issues and potential safety hazards while driving.
5. Can I repair the C1938 code issue in my Lexus myself?
- Repairing the C1938 code issue often requires advanced automotive diagnostic skills and specialized tools, so it is recommended to seek professional assistance for an accurate diagnosis and repair.
6. How much does it typically cost to repair the C1938 code in a Lexus?
- The cost of repairing the C1938 code can vary depending on the underlying cause of the issue, but it may involve replacement of the front active stabilizer control ECU, relay power supply IC, or wiring, which can range from a few hundred to a few thousand dollars.
7. Are there any preventive maintenance tips to avoid triggering the C1938 code in my Lexus?
- To prevent triggering the C1938 code, it's important to regularly inspect and maintain the front active stabilizer control system, including checking for any signs of wear or damage in the components.
8. Can a faulty battery or alternator cause the C1938 code to appear in a Lexus?
- While a faulty battery or alternator can potentially cause electrical issues in a vehicle, the C1938 code specifically relates to the malfunction in the front active stabilizer control ECU and relay power supply IC.
9. How long does it usually take to repair the C1938 code issue in a Lexus?
- The repair time for the C1938 code can vary depending on the extent of the issue and availability of parts, but it may take a few hours to a full day for a qualified technician to diagnose and repair the problem.
10. Can resetting the OBDII system clear the C1938 code in a Lexus temporarily?
- Resetting the OBDII system may temporarily clear the C1938 code, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and repair the root cause of the problem to prevent further issues.
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