AutoCodes – Generic – P174C

P174C Code - Partial Transmission 1 Valve 2 Electrical Error

Quick Answer

The Engine Control Module (ECM) monitors the Partial Transmission 1 Valve 2. Common causes include Faulty Partial Transmission 1 Valve 2, Partial Transmission 1 Valve 2 harness is open or shorted, Partial Transmission 1 Valve 2 circuit poor electrical connection. 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
P174C indicates Partial Transmission 1 Valve 2 Electrical Error.
Common causes
Common causes include Faulty Partial Transmission 1 Valve 2, Partial Transmission 1 Valve 2 harness is open or shorted, Partial Transmission 1 Valve 2 circuit poor electrical connection.
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 12,595
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jan 14, 2020
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Code P174C Description

The Engine Control Module (ECM) monitors the Partial Transmission 1 Valve 2. The ECM sets the OBDII code when the Partial Transmission 1 Valve 2 is not to factory specifications.
OBDII Code P174C - Partial Transmission 1 Valve 2 Electrical Error - AutoCodes.com
P174C Code - Partial Transmission 1 Valve 2 Electrical Error

What are the Possible Causes of the DTC P174C?

  • Faulty Partial Transmission 1 Valve 2
  • Partial Transmission 1 Valve 2 harness is open or shorted
  • Partial Transmission 1 Valve 2 circuit poor electrical connection

How to Fix the DTC P174C?

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 P174C 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.

Need more information about the P174C code?

Need more information on how to fix the P174C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P174C code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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 P174C Code

1. What are the common symptoms of OBDII code P174C (Partial Transmission 1 Valve 2 Electrical Error)?

- Common symptoms include rough shifting, transmission slippage, poor acceleration, and illuminated Check Engine Light.

2. What are the possible causes of OBDII code P174C?

- The code P174C can be caused by issues such as a faulty transmission valve, electrical wiring issues, a defective transmission control module, or a malfunctioning solenoid.

3. How can I diagnose OBDII code P174C?

- Diagnosis involves using a diagnostic scanner to read the code, inspecting the transmission system for visible damage, checking the wiring harness for connectivity issues, and testing the transmission valve and related components.

4. Can I drive my vehicle with OBDII code P174C active?

- It is not recommended to drive the vehicle with an active P174C code, as it can lead to further damage to the transmission system. It is best to address the issue promptly.

5. How can I repair OBDII code P174C?

- Repair options include replacing the faulty transmission valve, repairing or replacing damaged wiring, resetting the transmission control module, or addressing any issues with the solenoid.

6. Will resetting the Check Engine Light resolve OBDII code P174C?

- Simply resetting the Check Engine Light will not resolve the underlying issue causing the P174C code. It is important to diagnose and address the root cause of the problem.

7. Is OBDII code P174C a serious problem?

- Yes, OBDII code P174C should be taken seriously as it indicates a malfunction in the transmission system, which can lead to drivability issues and potential damage if not addressed promptly.

8. Can a DIYer fix OBDII code P174C at home?

- While some DIYers may have the skills to address OBDII code P174C, it is recommended to consult a professional mechanic with experience in transmission repairs to ensure the issue is properly diagnosed and repaired.

9. How much does it cost to repair OBDII code P174C?

- The cost of repairing OBDII code P174C can vary depending on the specific underlying issue, parts needed for repair, and labor costs. It is advisable to obtain quotes from local repair shops for a more accurate estimate.

10. How can I prevent OBDII code P174C from recurring?

- Regular maintenance of the transmission system, including fluid checks and changes as recommended by the manufacturer, can help prevent issues that may trigger OBDII code P174C.

Discuss the causes and fixes for P174C OBDII Code

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