C1439 Lexus Code - Steering Angle Sensor Initialization Incomplete
Quick Answer
The Skid Control ECU (Brake Actuator Assembly) acquires a steering sensor zero point every time the ignition switch is turned to ON and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. Common causes include Faulty Steering Angle Sensor, Steering Angle Sensor harness is open or shorted, Steering Angle 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
- C1439 Lexus indicates Steering Angle Sensor Initialization Incomplete.
- Common causes
- Common causes include Faulty Steering Angle Sensor, Steering Angle Sensor harness is open or shorted, Steering Angle 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.
Code C1439 Lexus Description
What are the Possible Causes of the DTC C1439 Lexus?
- Faulty Steering Angle Sensor
- Steering Angle Sensor harness is open or shorted
- Steering Angle Sensor circuit poor electrical connection
- Yaw Rate and Acceleration Sensor (for separate type)
- Yaw Rate and Acceleration Sensor (Airbag sensor assembly) (for built-in type)
How to Fix the DTC C1439 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 C1439 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 C1439 Lexus Code
1. What does the OBDII code C1439 mean for a Lexus?
C1439 indicates that the steering angle sensor (SAS) initialization is incomplete, which is necessary for proper operation of the vehicle's stability control system.
2. What are the common symptoms of code C1439 in a Lexus?
Common symptoms include the traction control or stability control warning light illuminating, potential loss of stability control functionality, and difficulty with electronic steering-related features.
3. What causes the C1439 code to be triggered?
The code is usually triggered when the steering angle sensor is not properly calibrated after a repair, battery disconnection, or alignment work.
4. How do you fix the Lexus C1439 code?
The fix involves recalibrating or initializing the steering angle sensor using a compatible scan tool or diagnostic system.
5. Can you drive a Lexus with a C1439 code?
While the vehicle may still be drivable, safety systems such as traction and stability control may not function correctly, posing a potential safety risk.
6. How is the steering angle sensor initialized on a Lexus?
Initialization typically requires a diagnostic tool to reset and calibrate the sensor by following specific steps outlined in the vehicle’s service manual.
7. Do you need to replace the steering angle sensor for a C1439 code?
In most cases, the sensor does not need replacement. The issue is usually resolved through proper initialization or recalibration.
8. Can a battery replacement cause the C1439 code on a Lexus?
Yes, disconnecting or replacing the battery can cause the steering angle sensor to lose its calibration, triggering the C1439 code.
9. How much does it cost to fix a C1439 code on a Lexus?
The cost varies but is typically minimal if only recalibration is needed. A dealership or repair shop may charge a diagnostic fee and a small labor cost for the initialization.
10. What tools are needed to fix the C1439 code on a Lexus?
You will need a compatible OBDII scan tool or diagnostic device capable of performing steering angle sensor calibration.
Discuss the causes and fixes for C1439 Lexus OBDII Code
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