Engine-CodesLexus – C1273 Lexus

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

Quick Answer

The C1273 diagnostic trouble code (DTC) for Lexus vehicles indicates a low output signal from the rear speed sensor on the right side of the vehicle. Common causes include Faulty rear speed sensor, Damaged wiring or connectors, Corrosion or debris affecting sensor performance. 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, Damaged wiring or connectors, Corrosion or debris affecting sensor performance.
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.
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code C1273 Lexus Description

The C1273 diagnostic trouble code (DTC) for Lexus vehicles indicates a low output signal from the rear speed sensor on the right side of the vehicle. The speed sensor is a crucial component of the anti-lock braking system (ABS) and traction control system. It is responsible for measuring the speed of the wheel and sending this information to the vehicle's electronic control unit (ECU). When the ECU detects a low output signal from the rear speed sensor on the right side, it can lead to issues with the ABS and traction control systems, affecting the vehicle's overall performance and safety.

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

Common Causes of C1273 Lexus

  1. Faulty rear speed sensor
  2. Damaged wiring or connectors
  3. Corrosion or debris affecting sensor performance
  4. ABS module malfunction
  5. Electrical issues in the ABS system

Symptoms of C1273 Lexus

  1. Illumination of the ABS warning light on the dashboard
  2. Traction control system malfunction
  3. Decreased braking performance
  4. Unusual noises coming from the wheel area
  5. Uneven braking or pulling to one side while braking

How to Fix C1273 Lexus

  1. Begin by diagnosing the specific cause of the low output signal using a diagnostic scan tool to retrieve the ABS codes.
  2. Inspect the rear speed sensor on the right side of the vehicle for any visible damage or signs of wear.
  3. Check the wiring and connectors connected to the speed sensor for any breaks, corrosion, or loose connections.
  4. Clean the sensor and connectors to ensure proper contact and functionality.
  5. If the sensor is faulty, replace it with a new one and recalibrate the ABS system to clear the DTC.

Cost to Fix C1273 Lexus

The typical repair costs for addressing a low output signal from the rear speed sensor on a Lexus vehicle can range from $150 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less for similar services.

Tech Notes for C1273 Lexus

Because the Rear Axle Hub and Bearing Assembly cannot be disassembled, if the Rear Speed Sensor needs replacement, replace the Rear Axle Hub and Bearing Assembly.

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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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