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Engine-Codes – Scion – C2173 Scion

C2173 Scion Code - Vehicle Speed Or Engine Speed Signal Malfunction

Quick Answer

The C2173 diagnostic trouble code (DTC) for Scion vehicles indicates a malfunction in the signal related to either vehicle speed or engine speed. Common causes include Faulty vehicle speed sensor or engine speed sensor, Damaged wiring harness or connectors related to speed sensors, ECM or TCM software issues. 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
C2173 Scion indicates Vehicle Speed Or Engine Speed Signal Malfunction.
Common causes
Common causes include Faulty vehicle speed sensor or engine speed sensor, Damaged wiring harness or connectors related to speed sensors, ECM or TCM software issues.
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 07, 2024
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Code C2173 Scion Description

The C2173 diagnostic trouble code (DTC) for Scion vehicles indicates a malfunction in the signal related to either vehicle speed or engine speed. This code typically points to a problem with the sensors or circuits responsible for monitoring the speed of the vehicle or the engine. When this code is triggered, it can have various implications for the vehicle's performance and overall functionality.

OBDII Code C2173 Scion - Vehicle Speed Or Engine Speed Signal Malfunction
C2173 Scion Code - Vehicle Speed Or Engine Speed Signal Malfunction

Common Causes of C2173 Scion

  1. Faulty vehicle speed sensor or engine speed sensor.
  2. Damaged wiring harness or connectors related to speed sensors.
  3. ECM or TCM software issues.
  4. Mechanical issues affecting the speed sensors, such as debris or corrosion.
  5. Electrical problems, such as a blown fuse or relay related to speed sensors.

Symptoms of C2173 Scion

  1. Inaccurate speedometer readings or fluctuations in speed readings.
  2. Engine stalling or hesitation during acceleration.
  3. Transmission shifting erratically or harshly.
  4. Check Engine Light (CEL) illuminated on the dashboard.
  5. Reduced fuel efficiency or power output.

How to Fix C2173 Scion

  1. Start by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the specific trouble code and confirm the issue.
  2. Inspect the vehicle speed sensor and engine speed sensor for any visible damage or signs of wear. Replace any faulty sensors as needed.
  3. Check the wiring harness and connectors for any breaks, corrosion, or loose connections. Repair or replace any damaged components.
  4. Clear the DTC from the ECM or TCM memory using the diagnostic scanner and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnosis may be required to pinpoint the exact cause, such as checking for ECM/TCM software updates or conducting more in-depth electrical testing.

Cost to Fix C2173 Scion

The typical repair costs for addressing a C2173 code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the parts for replacing a speed sensor or wiring harness can range from $50 to $200, while labor costs can add another $80 to $150 per hour. In total, the repair for this issue could cost anywhere from $150 to $500, but prices may fluctuate based on the severity of the problem and the required repairs. It's recommended to consult with a qualified mechanic or repair shop to obtain a more precise estimate based on your vehicle's make and model.

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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 C2173 Scion Code

1. What are common symptoms of OBDII code C2173 in a Scion?

- Common symptoms include erratic or incorrect speedometer readings, engine stalling, and issues with the vehicle's transmission shifting properly.

2. What could cause the OBDII code C2173 in a Scion?

- The code C2173 typically indicates a malfunction in the vehicle speed or engine speed signal, which can be caused by a faulty speed sensor, wiring issues, or a problem with the vehicle's ECU.

3. How can I diagnose the cause of OBDII code C2173 in my Scion?

- To diagnose the issue, you can perform a visual inspection of the speed sensor and its wiring, check for any loose connections, and use an OBDII scanner to read live data and monitor the speed sensor readings.

4. Can I still drive my Scion with OBDII code C2173?

- It is not recommended to drive your Scion with the OBDII code C2173, as it can lead to potential safety hazards and further damage to the vehicle. It's best to address the issue promptly.

5. How can I repair OBDII code C2173 in my Scion?

- Repairing the code C2173 typically involves replacing the faulty speed sensor, repairing any damaged wiring, or reprogramming the vehicle's ECU. It's advisable to consult a professional mechanic for accurate diagnosis and repair.

6. Is OBDII code C2173 a serious issue in a Scion?

- While the severity of the issue may vary, OBDII code C2173 should not be ignored as it can affect the vehicle's performance and safety. It's best to address the problem promptly to avoid further complications.

7. Can a DIY enthusiast fix OBDII code C2173 in a Scion?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to replace the speed sensor or repair wiring issues causing OBDII code C2173. However, complex repairs or ECU reprogramming may require professional assistance.

8. How much does it cost to repair OBDII code C2173 in a Scion?

- The cost of repairing OBDII code C2173 in a Scion can vary depending on the cause of the issue, the extent of the repairs needed, and labor costs. It's advisable to obtain quotes from local mechanics for an accurate estimate.

9. Can resetting the OBDII code C2173 in my Scion temporarily solve the issue?

- Resetting the OBDII code C2173 may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear. It's important to diagnose and repair the root cause of the problem.

10. Will OBDII code C2173 cause my Scion to fail an emissions test?

- OBDII code C2173 can cause your Scion to fail an emissions test, as it indicates a malfunction related to the vehicle's speed or engine speed signal. It's important to address the issue before undergoing an emissions test.

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