P0128 2018 Chevrolet Silverado Code - Engine Coolant Temperature Below Thermostat Regulating Temperature
Quick Answer
The P0128 code on a 2018 Chevrolet Silverado indicates that the engine coolant temperature is below the thermostat regulating temperature. Common causes include Malfunctioning thermostat, Faulty engine coolant temperature sensor, Stuck open thermostat. 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
- P0128 2018 Chevrolet Silverado indicates Engine Coolant Temperature Below Thermostat Regulating Temperature.
- Common causes
- Common causes include Malfunctioning thermostat, Faulty engine coolant temperature sensor, Stuck open thermostat.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0128 2018 Chevrolet Silverado Description
The P0128 code on a 2018 Chevrolet Silverado indicates that the engine coolant temperature is below the thermostat regulating temperature. This means that the engine is not reaching the optimal operating temperature as designed by the manufacturer. The engine coolant temperature sensor is detecting that the temperature of the coolant is not reaching the expected level within a specified time frame, which can lead to various performance issues and potential long-term effects if not addressed promptly.
Common Causes of P0128 2018 Chevrolet Silverado
- Malfunctioning thermostat
- Faulty engine coolant temperature sensor
- Stuck open thermostat
- Low coolant levels
- Malfunctioning engine cooling fan
Symptoms of P0128 2018 Chevrolet Silverado
- Decreased fuel efficiency
- Reduced power and acceleration
- Rough idling
- Potential stalling
- Check Engine Light illuminated
How to Fix P0128 2018 Chevrolet Silverado
- Diagnose the issue by checking the coolant level and condition, testing the thermostat, and inspecting the engine coolant temperature sensor.
- Replace the thermostat if it is determined to be faulty or stuck open.
- Replace the engine coolant temperature sensor if it is malfunctioning.
- Check for any leaks or low coolant levels and address as needed.
- Test the engine cooling fan operation and replace if necessary.
Cost to Fix P0128 2018 Chevrolet Silverado
The typical repair costs for addressing a P0128 code on a 2018 Chevrolet Silverado can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor in your area. It's important to keep in mind that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple shops to ensure you are getting a fair price. Additionally, factors such as location, vehicle make and model, and engine type can also impact the overall repair costs.
Tech Notes for P0128 2018 Chevrolet Silverado
User Submitted Video
Need more information about the P0128 2018 Chevrolet Silverado code?
Need more information on how to fix the P0128 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0128 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0128 2018 Chevrolet Silverado Code
No Frequently Asked Questions about P0128 2018 Chevrolet Silverado Code found.
Discuss the causes and fixes for P0128 2018 Chevrolet Silverado OBDII Code
Code P0128 2018 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.