AutoCodesLexus – C1273 Lexus

C1273 Lexus Code - Low Output Signal of Rear Speed Sensor Right

Quick Answer

The speed sensor detects the wheel speed and sends the appropriate signals to the Skid Control ECU (Brake Actuator Assembly). Common causes include Faulty Rear Speed Sensor Right (Rear Axle Hub and Bearing Assembly Right), Rear Speed Sensor Right Rotor (Rear Axle Hub and Bearing Assembly Right), Rear Speed Sensor Right 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
C1273 Lexus indicates Low Output Signal of Rear Speed Sensor Right.
Common causes
Common causes include Faulty Rear Speed Sensor Right (Rear Axle Hub and Bearing Assembly Right), Rear Speed Sensor Right Rotor (Rear Axle Hub and Bearing Assembly Right), Rear Speed Sensor Right 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.
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Code Popularity 1,774
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 21, 2024
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Code C1273 Lexus Description

The speed sensor detects the wheel speed and sends the appropriate signals to the Skid Control ECU (Brake Actuator Assembly). These signals are used for Anti-Lock Brake System (ABS) control. Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change when the rotors turn. Each speed sensor detects that magnetic change and sends a pulse signal to the Skid Control ECU (Brake Actuator Assembly).
OBDII Code C1273 Lexus - Low Output Signal of Rear Speed Sensor Right - AutoCodes.com
C1273 Lexus Code - Low Output Signal of Rear Speed Sensor Right

What are the Possible Causes of the DTC C1273 Lexus?

  • Faulty Rear Speed Sensor Right (Rear Axle Hub and Bearing Assembly Right)
  • Rear Speed Sensor Right Rotor (Rear Axle Hub and Bearing Assembly Right)
  • Rear Speed Sensor Right harness is open or shorted
  • Rear Speed Sensor Right circuit poor electrical connection

How to Fix the DTC C1273 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1273 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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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 C1273 Lexus Code

1. What does OBDII code C1273 mean on a Lexus?

C1273 indicates a "Low Output Signal of Rear Speed Sensor Right," meaning the vehicle's ECU has detected an issue with the right rear wheel speed sensor.

2. What are the common symptoms of code C1273 in a Lexus?

Symptoms may include the ABS or traction control light turning on, reduced braking performance, and stability control system deactivation.

3. What causes the C1273 code to appear?

The most common causes include a faulty right rear wheel speed sensor, damaged sensor wiring, corroded connectors, or debris interfering with the sensor.

4. Can I drive my Lexus with the C1273 code?

While the car may still be drivable, safety systems like ABS and traction control may not function properly, so it’s best to address the issue promptly.

5. How do I diagnose the C1273 code on my Lexus?

Start by inspecting the right rear wheel speed sensor and its wiring for damage or disconnections. Use a diagnostic scanner to confirm sensor readings and clear the code after repairs.

6. How do I fix the C1273 code on a Lexus?

Repairs may involve cleaning or replacing the right rear wheel speed sensor, repairing damaged wiring, or cleaning debris off the sensor or tone ring.

7. What tools are needed to fix code C1273?

You’ll need a diagnostic scanner with ABS functionality, a multimeter to test wiring, and basic hand tools to remove and replace the sensor if necessary.

8. How much does it cost to fix the C1273 code on a Lexus?

The cost varies depending on the repair. Replacing a wheel speed sensor typically costs $100–$300, including parts and labor.

9. Can a dirty tone ring cause code C1273?

Yes, debris or rust on the tone ring can interfere with the sensor’s ability to read wheel speed, triggering the code.

10. Will clearing the C1273 code fix the problem?

Clearing the code without addressing the underlying issue will only temporarily remove the warning. The code will likely reappear until the root cause is resolved.

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