Engine-CodesScion – C1273 Scion

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

Quick Answer

The C1273 code for Scion indicates a low output signal of the rear speed sensor on the right side of the vehicle. Common causes include Faulty rear speed sensor, Damaged wiring or connectors leading to the sensor, Corrosion or debris affecting the sensor's 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 Scion indicates Low Output Signal of Rear Speed Sensor Right.
Common causes
Common causes include Faulty rear speed sensor, Damaged wiring or connectors leading to the sensor, Corrosion or debris affecting the sensor's 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 11, 2024
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Code C1273 Scion Description

The C1273 code for Scion indicates a low output signal of the rear speed sensor on the right side of the vehicle. The rear speed sensor is a crucial component of the vehicle's anti-lock braking system (ABS) and traction control system. This sensor measures the speed of the right rear wheel and sends this information to the vehicle's electronic control unit (ECU) to assist in regulating the vehicle's braking and stability systems.

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

Common Causes of C1273 Scion

  1. Faulty rear speed sensor
  2. Damaged wiring or connectors leading to the sensor
  3. Corrosion or debris affecting the sensor's performance
  4. Issues with the ECU receiving the sensor's signal
  5. Mechanical damage to the wheel or sensor mounting area

Symptoms of C1273 Scion

  1. ABS warning light illuminated on the dashboard
  2. Traction control system malfunction
  3. Uneven braking performance
  4. Increased stopping distance
  5. Unstable handling on slippery surfaces

How to Fix C1273 Scion

  1. Begin by conducting a visual inspection of the rear speed sensor and its wiring to check for any visible damage, corrosion, or debris.
  2. Use a multimeter to test the rear speed sensor's output signal and compare it to the manufacturer's specifications.
  3. If the sensor is found to be faulty, replace it with a new one and ensure proper installation.
  4. Test the vehicle to verify that the ABS and traction control systems are functioning correctly after the repair.
  5. Clear the diagnostic trouble codes from the ECU to reset the system and ensure that the warning lights are no longer illuminated.

Cost to Fix C1273 Scion

The cost of repairing a low output signal of the rear speed sensor on a Scion can vary depending on the specific issue, the cost of the sensor itself, and the labor rates of the repair shop. On average, the repair cost for this issue can range from $150 to $300, including parts and labor. It's important to keep in mind that labor rates can differ based on location and the type of repair shop, so it's advisable to obtain quotes from multiple sources to ensure a fair price.

Tech Notes for C1273 Scion

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 Scion Code

1. What does the OBDII code C1273 mean for a Scion?

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

2. What are the common symptoms of code C1273 on a Scion?

Symptoms may include an illuminated ABS or traction control warning light, reduced braking performance, or ABS disengagement.

3. What causes the C1273 code to appear?

Common causes include a faulty rear right wheel speed sensor, damaged sensor wiring, a malfunctioning ABS control module, or debris on the sensor or reluctor ring.

4. Can I still drive my Scion with the C1273 code active?

While the vehicle may still be drivable, the ABS and traction control systems may not function properly, increasing the risk of losing control during hard braking or slippery conditions.

5. How do I diagnose the C1273 code on a Scion?

Start by inspecting the rear right wheel speed sensor and its wiring for damage or loose connections. Use a diagnostic scanner to check for live wheel speed data and test the sensor’s resistance with a multimeter.

6. How can I fix the C1273 error code?

Repairs may include replacing the faulty rear right wheel speed sensor, repairing damaged wiring, cleaning debris off the sensor or reluctor ring, or replacing the ABS control module if necessary.

7. How much does it cost to repair the C1273 code on a Scion?

The cost typically ranges from $100 to $300, depending on whether the sensor or wiring needs replacement. ABS module repairs may cost more.

8. Can a dirty reluctor ring cause the C1273 code?

Yes, dirt, debris, or corrosion on the reluctor ring can interfere with the sensor’s signal and trigger the code.

9. Do I need to reset the ABS system after repairing the C1273 issue?

Yes, after completing repairs, use a diagnostic scanner to clear the code and reset the ABS system.

10. How can I prevent the C1273 code from recurring?

Regularly inspect and clean wheel speed sensors and reluctor rings, and address any ABS warning lights promptly to avoid recurring issues.

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