C1381 Code - Acceleration Sensor Power Supply Voltage Malfunction
Quick Answer
The Skid Control ECU (Brake Actuator Assembly) receives signals from the Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly) via the Controller Area Network (CAN) communication system. Common causes include Acceleration Sensor Calibration, Faulty Acceleration Sensor (Airbag Sensor Assembly), Acceleration Sensor harness is open or shorted. 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
- C1381 indicates Acceleration Sensor Power Supply Voltage Malfunction.
- Common causes
- Common causes include Acceleration Sensor Calibration, Faulty Acceleration Sensor (Airbag Sensor Assembly), Acceleration Sensor harness is open or shorted.
- 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 C1381 Description
If there is trouble in the bus lines between the Acceleration Sensor (Airbag Sensor Assembly) and the CAN communication system, the DTC U0124 (Lost Communication with Lateral Acceleration Sensor Module) is output.
This Diagnostic Trouble Code (DTC) is also output when calibration has not been completed.
What are the Possible Causes of the DTC C1381?
- Acceleration Sensor Calibration
- Faulty Acceleration Sensor (Airbag Sensor Assembly)
- Acceleration Sensor harness is open or shorted
- Acceleration Sensor circuit poor electrical connection
How to Fix the DTC C1381?
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 C1381 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 C1381 code?
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Need Help with the Code?
Get the C1381 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- C1381 Lexus — Acceleration Sensor Power Supply Voltage Malfunction
- C1381 Scion — Acceleration Sensor Power Supply Voltage Malfunction
- C1381 Toyota — Acceleration Sensor Power Supply Voltage Malfunction
Frequently Asked Questions about C1381 Code
1. What are the common symptoms of OBDII code C1381 (Acceleration Sensor Power Supply Voltage Malfunction)?
- Common symptoms include the ABS warning light coming on, issues with the vehicle stability control system, and potential loss of traction control.
2. What are the possible causes of OBDII code C1381?
- Possible causes include a malfunctioning acceleration sensor, a faulty power supply to the sensor, damaged wiring or connectors, or issues with the ABS control module.
3. How can I diagnose the cause of OBDII code C1381?
- Diagnosing this code typically involves using a professional OBDII scanner to retrieve the specific fault codes, inspecting the acceleration sensor and its wiring for damage, and testing the power supply voltage to the sensor.
4. Can I continue driving my vehicle with OBDII code C1381 present?
- It is not recommended to continue driving with this code present, as it may affect the vehicle's stability control and traction control systems, potentially compromising safety.
5. How can I repair OBDII code C1381?
- Repair options may include replacing the acceleration sensor, repairing or replacing damaged wiring or connectors, checking and repairing the power supply to the sensor, or reprogramming the ABS control module if necessary.
6. Is it safe to reset the OBDII code C1381 without addressing the underlying issue?
- Resetting the code without addressing the underlying issue may temporarily turn off the warning light, but the problem will likely reoccur, potentially affecting the vehicle's safety systems.
7. Can a DIY enthusiast fix OBDII code C1381 at home?
- While some aspects of diagnosing and repairing this code can be done at home, it may require specialized tools and expertise, so it's recommended to consult a professional mechanic for proper diagnosis and repair.
8. Are there any preventive measures to avoid OBDII code C1381 in the future?
- Regular maintenance checks, including inspecting the ABS system components and wiring, can help prevent issues that may trigger OBDII code C1381.
9. How long does it typically take to repair OBDII code C1381?
- The repair time can vary depending on the exact cause of the code and the availability of parts, but it may take a few hours to a full day for a qualified mechanic to diagnose and fix the issue.
10. Will fixing OBDII code C1381 improve my vehicle's performance?
- Fixing this code will primarily restore the proper functioning of the stability control and traction control systems, ensuring safe and reliable operation of your vehicle.
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