AutoCodesChevrolet – P0974 2014 Chevrolet Silverado

P0974 2014 Chevrolet Silverado Code - Shift Solenoid Valve 1 Control Circuit High Voltage

Quick Answer

The shift solenoid 1 is part of the control solenoid valve assembly which has no serviceable parts. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve. 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
P0974 2014 Chevrolet Silverado indicates Shift Solenoid Valve 1 Control Circuit High Voltage.
Common causes
Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve.
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 499
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 25, 2024
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Code P0974 2014 Chevrolet Silverado Description

The shift solenoid 1 is part of the control solenoid valve assembly which has no serviceable parts. The shift solenoid 1 is a normally closed ON/OFF solenoid and is controlled by the Transmission Control Module through a low side driver. When the shift solenoid 1 is energized, shift solenoid 1 fluid pressure is directed to the clutch select valve 2. Power to the shift solenoid 1 is supplied by the Transmission Control Module through a high-side driver. The high-side driver protects the circuit and components from excessive current flow. If excessive current flow is detected, the high side driver will turn OFF. When the fault is corrected, the high-side driver will reset. The Diagnostic Trouble Code (DTC) will be set when the control solenoid valve assembly detects an internal high voltage electrical malfunction of the shift solenoid 1 control circuit when the shift solenoid 1 is commanded ON for 2 seconds.
OBDII Code P0974 2014 Chevrolet Silverado - Shift Solenoid Valve 1 Control Circuit High Voltage - AutoCodes.com
P0974 2014 Chevrolet Silverado Code - Shift Solenoid Valve 1 Control Circuit High Voltage

What are the Possible Causes of the DTC P0974 2014 Chevrolet Silverado?

  • Low transmission fluid level
  • Dirty transmission fluid
  • Faulty Transmission Control Solenoid Valve
  • Transmission Control Solenoid Valve harness is open or shorted
  • Transmission Control Solenoid Valve circuit poor electrical connection

How to Fix the DTC P0974 2014 Chevrolet Silverado?

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 P0974 2014 Chevrolet Silverado 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 P0974 2014 Chevrolet Silverado code?

Need more information on how to fix the P0974 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P0974 2014 Chevrolet Silverado Code

1. What does the OBDII code P0974 mean for a 2014 Chevrolet Silverado?

P0974 indicates a "Shift Solenoid Valve 1 Control Circuit High Voltage," meaning there is an issue with the electrical circuit controlling shift solenoid valve 1.

2. What are the symptoms of code P0974 in a 2014 Chevrolet Silverado?

Common symptoms include harsh shifting, delayed gear engagement, transmission stuck in one gear, and the illumination of the check engine light.

3. What causes the P0974 code in a 2014 Chevrolet Silverado?

Common causes include a faulty shift solenoid, damaged wiring or connectors, a short to voltage in the circuit, or a malfunctioning transmission control module (TCM).

4. Can I drive my 2014 Chevrolet Silverado with a P0974 code?

While the vehicle may still be drivable, continuing to drive with this code can cause further damage to the transmission. It is recommended to address the issue promptly.

5. How do I diagnose the P0974 code in a 2014 Chevrolet Silverado?

Diagnosis involves checking the shift solenoid and its wiring for damage, testing the circuit for shorts or high resistance, and verifying proper operation of the TCM.

6. How much does it cost to repair a P0974 code on a 2014 Chevrolet Silverado?

The repair cost can vary depending on the underlying cause. Replacing a shift solenoid typically costs $150–$400, while fixing wiring issues may cost less.

7. Can a faulty battery cause the P0974 code in a 2014 Chevrolet Silverado?

A weak or malfunctioning battery can sometimes cause electrical issues, but it is less likely to directly trigger a P0974 code. Focus on the solenoid circuit first.

8. How do I reset the P0974 code after repairs on my 2014 Chevrolet Silverado?

After repairs, use an OBDII scanner to clear the code. If the issue is resolved, the code should not return.

9. What tools are needed to diagnose and repair the P0974 code in a 2014 Chevrolet Silverado?

Basic tools include an OBDII scanner, a multimeter for circuit testing, and possibly a wiring diagram for the transmission system.

10. Can a transmission fluid issue cause the P0974 code in a 2014 Chevrolet Silverado?

Low or dirty transmission fluid is unlikely to directly cause P0974, but it can contribute to solenoid or transmission problems. Ensure the fluid is clean and at the proper level.

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