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.

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.

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 could cause the code p0128?

A stuck thermostat is the most common cause of a P0128 code. When the engine warms up, wax inside the thermostat expands pushing down on spring loaded valve. This causes the valve to open; flow to the bypass port is blocked and flow to the radiator is enabled.

What causes a p0128 code on GM?

P0128 Causes: GMC Envoy. Fixing P0128 is usually a pretty easy thing to do, since 90% of the time it’s going to be the thermostat that is throwing the code. 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 is p0128 code on GMC?

P0128 is a relatively common OBDII trouble code. It is triggered when your GMC Envoy ‘s coolant temperature fails to reach the proper operating temperature. It’s a generic powertrain code, which means that regardless of who manufactured the vehicle, it’ll have the same meaning (1996+).

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.

What causes a Chevy Silverado to have a trouble code?

Here are the symptoms associated with this trouble code: Lack of heat – The biggest symptom of the P0128 trouble code in the Chevy Silverado is going to be lack of heat. When the thermostat doesn’t bring the engine all of the way up to the proper operating temp, it means that the water going through the heater core isn’t as hot.

When does the PCM record code p0128?

The PCM will record if either of these two criteria is not met. If either fault is recorded again on the next engine startup, code P0128 is triggered. What Are The Symptoms Of P0128? What Is The Cause Of Code P0128? How Serious Is Code P0128? – Low