What is the coolant thermostat code p0128?
Code P0128 is most likely caused by one of the following: What are the symptoms of code P0128? The description for code P0128 is “coolant thermostat (coolant temperature below thermostat regulating temperature).” This code is set when the PCM notices that the engine has not reached operating temperature within the specified time.
What does the code p0128 mean on an OBDII?
The OBDII trouble code P0128 – Coolant Temperature Below Thermostat Regulating Temperature means that the engine does not reach expected temperature after running for sufficient time, or in other words, takes too long to warm up. Often this code causes the Check Engine light to come on and off in cold temperatures.
What causes the p0128 code on a Chrysler 300?
Here are the most common causes of P0128: Thermostat Stuck Open – Far and away, the most typical cause for the P0128 code is going to be a thermostat that is stuck open. When a thermostat is stuck open, it allows coolant to flow through the engine at all times.
What causes the coolant temperature sensor to change?
The coolant temperature sensor can be checked with a multimeter. The ohm reading will change with the temperature. If the ohm reading is not changing with the temperature, replace the coolant temperature sensor or repair the wiring for the sensor if it is damaged. The most common cause for P0128 is the engine coolant thermostat is stuck open.
What is the correct coolant temperature?
Coolant with a 50/50 mix of water and ethylene alcohol (anti-freeze) can function at temperatuares as cold as negative 36 degrees Fahrenheit. The acceptable range for an engine to run at sits between 195 degrees and 220 degrees Fahrenheit. This assumes a person is running a 50/50 mix of antifreeze and water.
What are the symptoms of a bad coolant temperature sensor?
Another symptom of a problem with the coolant temperature sensor is an overheating engine. The coolant temperature sensor can also fail in a manner that causes it to send a permanently hot signal. This can cause the computer to incorrectly compensate for a lean signal, which can result in overheating, and even misfires or engine ping.
What does the p0128 code mean?
P0128 is a diagnostic trouble code (DTC) for “Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)”.
What is check engine code p0128?
Check Engine code P0128. The Check Engine light is on with the code P0128 for the coolant thermostat (coolant temperature below thermostat regulating temperature).
Why does the thermostat not open when the engine is cold?
When the engine is cold, no coolant flows through the engine. Once the engine reaches its operating temperature, the thermostat opens. The OBDII sets when the engine coolant temperature has not risen enough to open the thermostat even though the engine has run long enough. This is due to a leak in the seal or the thermostat open stuck.
When to replace the cooling system thermostat?
If cooling system is not leaking and the fluid level is OK, replacing the thermostat usually takes care of the problem. What does this mean? When is the code detected? The engine coolant temperature does not reach to specified temperature even though the engine has run long enough.
When to set the coolant thermostat code?
This code is set when the PCM notices that the engine has not reached operating temperature within the specified time. In other words the engine is running too cold – or at least the PCM thinks it is.
What does it mean when your thermostat says p0128?
Also referred as “Thermostat Below Regulating Threshold”, Error Code P0128 means the PCM (Powertrain Control Module) of the vehicle has detected a problem on the thermostat, as it failed to reach the required temperature level within the specified time after starting the engine.
What is the error code for coolant thermostat?
Error Code P0128 is described as a Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature).
What causes the coolant thermostat to be stuck open?
The most common cause for P0128 is the engine coolant thermostat is stuck open. A simple way to diagnose this is to feel the radiator hose and monitor how hot the temperature of the coolant is when it starts flowing through the radiator hose.
What does it mean when your car thermostat is not reading any temperature?
Typically, it’s signaled when your thermostat isn’t reading any temperature or is reading an incorrect temperature. This conclusion is reached based on the intake air temperature sensor reading, the length of time your vehicle has been running and the engine coolant temperature sensor reading.
Why is my Check Engine light illuminated due to p0128?
When your check engine light is illuminated due to trouble code P0128, you may have an issue with your engine thermostat. Here are some helpful steps to take to find out how do I fix trouble code P0128? Learn how to solve this trouble code and repair your thermostat.
What does the coolant thermostat code p0128 mean?
All our repairs are backed by our 12-month / 12,000-mile warranty. Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) The P0128 code means that the engine coolant is not getting warm enough, fast enough.
The OBDII trouble code P0128 – Coolant Temperature Below Thermostat Regulating Temperature means that the engine does not reach expected temperature after running for sufficient time, or in other words, takes too long to warm up. Often this code causes the Check Engine light to come on and off in cold temperatures.
Here are the most common causes of P0128: Thermostat Stuck Open – Far and away, the most typical cause for the P0128 code is going to be a thermostat that is stuck open. When a thermostat is stuck open, it allows coolant to flow through the engine at all times.
What causes code p0128 on a Chevy Trailblazer?
Common problems causing the code P0128 in different cars: In many GM cars and trucks (Chevrolet Trailblazer, Silverado, HHR and other models) the code P0128 is often caused by a sticking thermostat. In some GM cars when the code P0128 is set, the temperature gauge stops working and the radiator fans run constantly.