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C1239 Scion Code - Foreign Object Attached on Tip of Left Rear Sensor

Quick Answer

The C1239 diagnostic trouble code (DTC) for Scion vehicles indicates that there is a foreign object attached to the tip of the left rear sensor. Common causes include Driving on rough or debris-laden roads, Improper installation of aftermarket parts or accessories near the sensor, Corrosion or rust buildup on the sensor tip. 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
C1239 Scion indicates Foreign Object Attached on Tip of Left Rear Sensor.
Common causes
Common causes include Driving on rough or debris-laden roads, Improper installation of aftermarket parts or accessories near the sensor, Corrosion or rust buildup on the sensor tip.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code C1239 Scion Description

The C1239 diagnostic trouble code (DTC) for Scion vehicles indicates that there is a foreign object attached to the tip of the left rear sensor. This sensor is a crucial component of the vehicle's anti-lock braking system (ABS) and plays a vital role in ensuring safe braking performance. When a foreign object is attached to the sensor, it can interfere with its ability to accurately detect wheel speed and send signals to the ABS control module. This can lead to erratic ABS operation, compromised braking performance, and potentially unsafe driving conditions.

OBDII Code C1239 Scion - Foreign Object Attached on Tip of Left Rear Sensor
C1239 Scion Code - Foreign Object Attached on Tip of Left Rear Sensor

Common Causes of C1239 Scion

  1. Driving on rough or debris-laden roads
  2. Improper installation of aftermarket parts or accessories near the sensor
  3. Corrosion or rust buildup on the sensor tip
  4. Impact from road debris or objects kicked up by other vehicles
  5. Poor maintenance practices leading to accumulation of dirt and grime around the sensor

Symptoms of C1239 Scion

  1. ABS warning light illuminated on the dashboard
  2. Pulsating brakes during normal driving or braking
  3. Increased stopping distances
  4. Loss of traction or stability during braking
  5. Unusual noises coming from the ABS system

How to Fix C1239 Scion

  1. Lift the vehicle and secure it on jack stands for safety.
  2. Inspect the left rear sensor for any foreign objects attached to the tip.
  3. Carefully remove the foreign object using compressed air or a soft brush.
  4. Clean the sensor tip and surrounding area to ensure proper operation.
  5. Test drive the vehicle to verify that the ABS warning light is no longer illuminated and that braking performance has returned to normal.

Cost to Fix C1239 Scion

The cost of repairing a foreign object attached to the tip of the left rear sensor on a Scion can vary depending on the extent of the damage and the specific repair procedures required. In general, the cost of this repair can range from $100 to $300, including parts and labor. However, it's important to note that labor rates at auto repair shops can vary widely, with hourly rates typically ranging from $80 to $150. Factors such as the location of the repair shop, the vehicle's make and model, and the type of engine can also influence the final cost. For a more accurate estimate, it's recommended to consult with a trusted auto repair professional in your area.

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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 C1239 Scion Code

1. What are the common symptoms of OBDII code C1239 in a Scion related to a foreign object attached to the tip of the left rear sensor?

The common symptoms include the ABS warning light coming on, potential loss of ABS functionality, and unusual braking behavior.

2. What could cause the OBDII code C1239 in a Scion indicating a foreign object on the left rear sensor tip?

The most likely cause is a physical obstruction, such as debris or a foreign object, interfering with the proper operation of the left rear sensor.

3. How can I diagnose if there is a foreign object attached to the left rear sensor causing code C1239 in my Scion?

Perform a visual inspection of the left rear sensor to check for any foreign objects or debris obstructing its tip. Cleaning the sensor may also help in identifying any attached objects.

4. Is it safe to drive my Scion with OBDII code C1239 due to a foreign object on the left rear sensor?

It is not recommended to drive the vehicle with this issue as it can affect the ABS system's functionality and compromise braking performance, leading to unsafe driving conditions.

5. Can I clear the OBDII code C1239 related to a foreign object on the left rear sensor tip in my Scion by simply removing the object?

Removing the foreign object may resolve the immediate cause of the code, but it is essential to perform a proper diagnosis to ensure there is no underlying damage to the sensor or ABS system.

6. Are there any DIY repair tips for fixing OBDII code C1239 in a Scion caused by a foreign object on the left rear sensor?

You can attempt to carefully remove any visible foreign objects from the left rear sensor tip. However, if the issue persists, it is recommended to seek professional assistance for a thorough inspection and repair.

7. What are the potential risks of ignoring OBDII code C1239 in a Scion triggered by a foreign object on the left rear sensor?

Ignoring this code can lead to compromised ABS functionality, which may result in reduced brake performance, longer stopping distances, and an increased risk of accidents.

8. Can weather conditions or road debris contribute to triggering OBDII code C1239 in a Scion due to a foreign object on the left rear sensor?

Yes, adverse weather conditions or driving on debris-filled roads can increase the likelihood of foreign objects becoming lodged on the left rear sensor, triggering the C1239 code.

9. How much does it typically cost to repair OBDII code C1239 in a Scion caused by a foreign object on the left rear sensor?

The cost of repair can vary depending on the extent of the damage and whether any components need replacement. It is advisable to consult a mechanic for an accurate assessment of repair costs.

10. Can OBDII code C1239 in a Scion be a recurring issue if foreign objects continue to attach to the left rear sensor?

Yes, if the root cause of foreign objects attaching to the left rear sensor is not addressed, the C1239 code may recur, leading to persistent ABS problems and safety concerns.

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