P0668 2016 GMC Sierra 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 GMC Sierra 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.
Code P0668 2016 GMC Sierra Description
What are the Possible Causes of the DTC P0668 2016 GMC Sierra?
- 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 GMC Sierra?
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 GMC Sierra 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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Frequently Asked Questions about P0668 2016 GMC Sierra Code
What does the OBDII code P0668 mean for a 2016 GMC Sierra?
The code P0668 indicates a "Control Module Temperature Sensor Circuit Low Voltage," meaning the temperature sensor in the control module is reporting lower voltage than expected.
What are the common symptoms of code P0668 in a GMC Sierra?
Symptoms may include engine misfires, poor fuel economy, difficulty starting, stalling, or the check engine light illuminating.
What causes the P0668 code to appear in a 2016 GMC Sierra?
Common causes include a faulty control module temperature sensor, damaged wiring or connectors, or a malfunctioning control module.
Can I drive my 2016 GMC Sierra with the P0668 code?
Driving with the P0668 code is not recommended as it may lead to performance issues or further damage to the control module.
How do you diagnose a P0668 code in a GMC Sierra?
Diagnosis involves using a scan tool to confirm the code, inspecting the temperature sensor and wiring for damage, and testing the circuit for proper voltage.
What parts might need replacement to fix the P0668 code?
You may need to replace the control module temperature sensor, repair damaged wiring, or replace the control module if it's defective.
How much does it cost to repair a P0668 code in a GMC Sierra?
Costs vary but may range from $100 to $500, depending on whether the issue is with the sensor, wiring, or control module.
How can you prevent the P0668 code from reoccurring?
Regular maintenance, such as inspecting wiring and connectors for damage, can help prevent the code from reappearing.
Can a faulty control module temperature sensor cause other issues?
Yes, a faulty sensor can lead to inaccurate temperature readings, which may affect engine performance and fuel efficiency.
Is the P0668 code specific to GMC vehicles?
No, the P0668 code can appear on other makes and models, but the diagnostic and repair process may vary.
Discuss the causes and fixes for P0668 2016 GMC Sierra OBDII Code
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