AutoCodesChevrolet – P0668 2016 Chevrolet Silverado

P0668 2016 Chevrolet Silverado Code - Control Module Temperature Sensor Circuit Low Voltage

Quick Answer

The Transmission Control Module (TCM) temperature sensor is located inside of the control solenoid valve assembly which has no serviceable parts. Common causes include Faulty Control Solenoid Valve Assembly, Control Solenoid Valve Assembly harness is open or shorted, Control Solenoid Valve Assembly 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
P0668 2016 Chevrolet Silverado indicates Control Module Temperature Sensor Circuit Low Voltage.
Common causes
Common causes include Faulty Control Solenoid Valve Assembly, Control Solenoid Valve Assembly harness is open or shorted, Control Solenoid Valve Assembly 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 219
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 23, 2022
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Code P0668 2016 Chevrolet Silverado Description

The Transmission Control Module (TCM) temperature sensor is located inside of the control solenoid valve assembly which has no serviceable parts. The Transmission Control Module temperature sensor provides the temperature of the Transmission Control Module substrate. This temperature reading is used in various diagnostic routines in the Transmission Control Module software. This fault is handled inside the Transmission Control Module and no external circuits are involved. The Diagnostic Trouble Code (DTC) will be set when the TCM internal temperature is −249°C (−416°F) or less for 1 min.
OBDII Code P0668 2016 Chevrolet Silverado - Control Module Temperature Sensor Circuit Low Voltage - AutoCodes.com
P0668 2016 Chevrolet Silverado Code - Control Module Temperature Sensor Circuit Low Voltage

What are the Possible Causes of the DTC P0668 2016 Chevrolet Silverado?

  • Faulty Control Solenoid Valve Assembly
  • Control Solenoid Valve Assembly harness is open or shorted
  • Control Solenoid Valve Assembly circuit poor electrical connection

How to Fix the DTC P0668 2016 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 P0668 2016 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 P0668 2016 Chevrolet Silverado code?

Need more information on how to fix the P0668 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P0668 2016 Chevrolet Silverado Code

What does the OBDII code P0668 mean for a 2016 Chevrolet Silverado?

Code P0668 indicates that the control module temperature sensor circuit is detecting a low voltage condition, suggesting a potential issue with the sensor or its wiring.

What are the common symptoms of code P0668 on a 2016 Chevrolet Silverado?

Symptoms may include engine performance issues, warning lights on the dashboard, reduced fuel efficiency, or difficulty starting the vehicle.

What causes code P0668 to appear on a 2016 Chevrolet Silverado?

Common causes include a faulty temperature sensor, damaged or corroded wiring, poor electrical connections, or a malfunctioning control module.

Can I drive my 2016 Chevrolet Silverado with code P0668?

While the vehicle may still operate, driving with this code can lead to further damage or reduced performance. It’s best to address the issue promptly.

How do I diagnose code P0668 on a 2016 Chevrolet Silverado?

Diagnosis involves checking the temperature sensor, inspecting wiring for damage or corrosion, testing electrical connections, and possibly scanning for related codes.

What parts might need replacing to fix code P0668 on a 2016 Chevrolet Silverado?

Parts that may need replacement include the control module temperature sensor, damaged wiring or connectors, or in rare cases, the control module itself.

How can I fix code P0668 on my 2016 Chevrolet Silverado?

Repairs may include replacing the faulty temperature sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or recalibrating the control module.

How much does it cost to fix code P0668 on a 2016 Chevrolet Silverado?

Repair costs vary based on the issue but typically range from $100 to $500, depending on whether parts need replacing or wiring repairs are required.

Can a faulty control module cause code P0668 on a 2016 Chevrolet Silverado?

Yes, a malfunctioning control module can cause issues with the temperature sensor circuit and trigger code P0668.

Will clearing the code P0668 fix the problem on my 2016 Chevrolet Silverado?

Clearing the code will remove it temporarily, but the underlying issue must be resolved to prevent the code from returning.

Discuss the causes and fixes for P0668 2016 Chevrolet Silverado OBDII Code

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