P0668 2015 Chevrolet Silverado Code - Control Module Temperature Sensor Circuit Low Voltage
Quick Answer
The P0668 diagnostic trouble code (DTC) for a 2015 Chevrolet Silverado indicates that there is a low voltage condition in the control module temperature sensor circuit. Common causes include Faulty Control Module Temperature Sensor: The sensor itself may be defective and not providing accurate temperature readings, Damaged Wiring or Connectors: Corrosion, fraying, or disconnection in the wiring or connectors of the sensor circuit can lead to a low voltage condition, Control Module Malfunction: Issues with the control module itself, such as internal damage or software glitches, can cause the sensor circuit to receive low voltage. 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 Module Temperature Sensor: The sensor itself may be defective and not providing accurate temperature readings, Damaged Wiring or Connectors: Corrosion, fraying, or disconnection in the wiring or connectors of the sensor circuit can lead to a low voltage condition, Control Module Malfunction: Issues with the control module itself, such as internal damage or software glitches, can cause the sensor circuit to receive low voltage.
- 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 P0668 2015 Chevrolet Silverado Description
The P0668 diagnostic trouble code (DTC) for a 2015 Chevrolet Silverado indicates that there is a low voltage condition in the control module temperature sensor circuit. The control module temperature sensor is responsible for monitoring the temperature of various components within the vehicle, such as the engine, transmission, or emissions system. When the voltage in the circuit is lower than the specified range, it can lead to issues with the vehicle's performance and overall functionality.
Common Causes of P0668 2015 Chevrolet Silverado
- Faulty Control Module Temperature Sensor: The sensor itself may be defective and not providing accurate temperature readings.
- Damaged Wiring or Connectors: Corrosion, fraying, or disconnection in the wiring or connectors of the sensor circuit can lead to a low voltage condition.
- Control Module Malfunction: Issues with the control module itself, such as internal damage or software glitches, can cause the sensor circuit to receive low voltage.
- Electrical Issues: Problems with the vehicle's electrical system, such as a weak battery or alternator, can affect the voltage in the sensor circuit.
Symptoms of P0668 2015 Chevrolet Silverado
- Check Engine Light: The most common symptom associated with the P0668 code is the illumination of the check engine light on the vehicle's dashboard.
- Engine Performance Issues: The vehicle may experience rough idling, stalling, or hesitation during acceleration due to incorrect temperature readings.
- Decreased Fuel Efficiency: A malfunctioning control module temperature sensor can lead to poor fuel economy as the engine may not be operating at the optimal temperature.
- Overheating: In severe cases, the engine may overheat due to inaccurate temperature readings, potentially causing damage to engine components.
How to Fix P0668 2015 Chevrolet Silverado
- Diagnose the Issue: Use a diagnostic scanner to retrieve the DTC and perform a thorough inspection of the control module temperature sensor circuit to identify the root cause of the low voltage condition.
- Test the Sensor: Check the resistance and voltage output of the control module temperature sensor to determine if it is functioning correctly.
- Inspect Wiring and Connectors: Examine the wiring and connectors in the sensor circuit for any damage, corrosion, or loose connections. Repair or replace as needed.
- Replace Control Module Temperature Sensor: If the sensor is found to be faulty, replace it with a new, OEM-quality sensor to ensure accurate temperature readings.
- Clear DTC and Test Drive: After completing the repairs, clear the DTC from the vehicle's memory using the diagnostic scanner and take the vehicle for a test drive to ensure the issue has been resolved.
Cost to Fix P0668 2015 Chevrolet Silverado
The typical repair costs for addressing the P0668 code on a 2015 Chevrolet Silverado can range from $150 to $400, depending on the specific cause of the low voltage condition and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Factors such as location, vehicle make and model, and engine type can also impact the overall repair costs. For a more precise estimate, it is recommended to consult with local auto repair shops to determine the exact cost of addressing this issue on your vehicle.
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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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