AutoCodes – Scion – C2173 Scion

C2173 Scion Code - Vehicle Speed Or Engine Speed Signal Malfunction

Quick Answer

The Tire Pressure Warning ECU receives a vehicle speed signal from the combination meter and an engine speed signal from the ECM. Common causes include Faulty Combination Meter, Faulty Tire Pressure Warning ECU, Tire Pressure Warning ECU 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: C2173 Scion indicates Vehicle Speed Or Engine Speed Signal Malfunction.
Common causes: Common causes include Faulty Combination Meter, Faulty Tire Pressure Warning ECU, Tire Pressure Warning ECU 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 1,598

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C2173 Scion Description

The Tire Pressure Warning ECU receives a vehicle speed signal from the combination meter and an engine speed signal from the ECM. The Tire Pressure Warning ECU sets the OBDII code when the Vehicle Speed Or Engine Speed Signal is not to factory specifications.

OBDII Code C2173 Scion - Vehicle Speed Or Engine Speed Signal Malfunction - AutoCodes.com — C2173 Scion Code - Vehicle Speed Or Engine Speed Signal Malfunction

What does this mean?

What are the Possible Causes of the DTC C2173 Scion?

Faulty Combination Meter
Faulty Tire Pressure Warning ECU
Tire Pressure Warning ECU harness is open or shorted
Tire Pressure Warning ECU circuit poor electrical connection

How to Fix the DTC C2173 Scion?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C2173 Scion 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 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.