P0668 2015 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 2015 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.
Code P0668 2015 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0668 2015 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 2015 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 2015 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.
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Frequently Asked Questions about P0668 2015 Chevrolet Silverado Code
1. What does the OBDII code P0668 mean on a 2015 Chevrolet Silverado?
P0668 indicates a "Control Module Temperature Sensor Circuit Low Voltage," meaning the engine control module (ECM) has detected an issue with the temperature sensor's voltage being too low.
2. What are the common symptoms of code P0668 in a 2015 Chevrolet Silverado?
Symptoms may include poor engine performance, increased fuel consumption, difficulty starting the engine, and the check engine light being illuminated.
3. What causes the P0668 code to appear on a 2015 Chevrolet Silverado?
Common causes include a faulty control module temperature sensor, damaged or corroded wiring, a poor electrical connection, or a malfunctioning ECM.
4. Can I drive my 2015 Chevrolet Silverado with the P0668 code active?
Driving with this code is not recommended, as it can lead to reduced performance and potential damage to the engine or other components if left unresolved.
5. How do I diagnose the P0668 code on a 2015 Chevrolet Silverado?
Diagnose by visually inspecting the sensor and wiring for damage, using a multimeter to check voltage and resistance, and scanning for additional codes to pinpoint the issue.
6. How do I fix a P0668 code on a 2015 Chevrolet Silverado?
Repairs may include replacing the control module temperature sensor, repairing or replacing damaged wiring, cleaning corroded connections, or reprogramming/replacing the ECM.
7. How much does it cost to repair the P0668 code on a 2015 Chevrolet Silverado?
Repair costs can range from $100 to $500 or more, depending on whether the sensor, wiring, or ECM needs replacement.
8. What tools do I need to troubleshoot the P0668 code on a 2015 Chevrolet Silverado?
You’ll need a diagnostic scanner, multimeter, wiring diagrams, and possibly basic hand tools to inspect and test components.
9. Can a dead battery or alternator cause the P0668 code?
Yes, a low or unstable voltage supply from a failing battery or alternator can trigger the P0668 code.
10. Will clearing the P0668 code fix the issue on my 2015 Chevrolet Silverado?
Clearing the code will turn off the check engine light temporarily, but it won’t resolve the underlying issue causing the code to appear.
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