If there are codes related to the ECT, such as P0117 or P0118, they indicate that the Engine Coolant Temp Sensor is not performing correctly, which means you should start diagnosing P0128 in your Chevy Venture by taking a look at the ECT and wiring.
If you feel the heater isn’t working well, that is the easiest way to tell the thermostat is stuck open. It can be challenging to tell this in a vehicle that doesn’t have a temperature gauge. ECT Sensor/ Wiring- If the thermostat itself isn’t the problem, it’ll be the wiring/sensor associated with Engine Coolant Temperature Sensor (ECT).Īn excellent way to tell if it’s a sensor issue or an issue with the thermostat is whether or not the Chevy Venture’s engine is running at its proper operating temperature.When this happens, the engine is “over-cooled” and never reaches the proper operating temperature. When a thermostat is stuck open, it allows coolant to flow through the engine at all times.
#Chevy coolant temperature sensor symptoms code
Thermostat Stuck Open– Far and away, the most typical cause for the P0128 code is a thermostat that is stuck open.Here are the most common causes of P0128: As a result, it consumes more gasoline to keep itself running correctly.įixing P0128 in the Chevy Venture is usually a pretty easy thing to do since, 90% of the time, a stuck thermostat will cause the problem. This is because your Venture’s engine is running at a cooler temperature than it should be.
Slight Decrease in fuel economy– The P0128 code may also lead to a slight decrease in fuel economy.Service Engine Soon– Other than the heater not working, the only other symptom of P0128 is typically the service engine soon light itself.If you feel your van’s heater working better when sitting still and worse on the highway, that’s a dead giveaway for a thermostat that is stuck open. When the thermostat doesn’t bring the engine up to the proper operating temp, it means that the coolant going through the heater core isn’t as hot. Lack of heat– The most prominent symptom of the P0128 trouble code in the Chevy Venture is the lack of heat.Other symptoms may include poor engine performance and a decrease in fuel economy. The most common symptom of a P0128 trouble code in a Chevy Venture is an illuminated malfunction indicator lamp (MIL).
#Chevy coolant temperature sensor symptoms driver
When the ECM detects that the engine’s coolant is not reaching its proper operating temperature within a set timeframe, it will trigger this P0128 trouble code to alert the driver of a potential issue. Below Thermostat Regulating TempĪs part of your Venture’s computer system, your Engine Control Module (ECM) tracks various engine conditions, such as air temperature, engine speed and load, coolant temperature, etc. P0128 indicates an issue with the engine’s coolant temperature not reaching the proper operating temperature within a certain amount of time. The coolant temp sensor is responsible for telling the Engine Control Module (ECM) the engine’s coolant temperature. The P0128 OBD-II trouble code is a generic powertrain diagnostic code (it has the same meaning for the Chevy Venture as any other vehicle).
P0128 Definition: Coolant Temp – Below Thermostat Regulating Temp Thermostat stuck open, Engine Coolant Temp Sensor (ECT) issues Lack of heat, MIL (check engine light), MPG Loss (1 or 2 tops) P0128: Coolant Temperature – Below Thermostat Regulating Temp P0128 is most often caused by a thermostat that is stuck open.
In this article, we’ll explore the possible causes of the Chevy Venture P0128 OBD II trouble code and some possible solutions. It’s essential to address this issue immediately, as vehicles with this issue have increased emissions and decreased fuel efficiency. This code can appear as soon as you start your vehicle, or it can also occur while driving. The P0128 OBD II trouble code indicates that your Chevy Venture’s engine coolant temperature has not reached its required operating temperature within a certain amount of time after starting the van.
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