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What causes a po128 code?
The most common cause for P0128 is the engine coolant thermostat is stuck open. When the thermostat does open, the hot coolant should start to flow and quickly warm up the radiator hose. If the radiator hose heats up slowly, the thermostat is stuck open or opening prematurely and needs to be replaced.
Is it bad to drive with P0128?
You may drive your vehicle with a P0128 trouble code. You will not notice any issue except for maybe the temperature gauge never reaching normal levels, and possibly the Check Engine light being illuminated.
How much does it cost to replace a coolant thermostat?
You will pay between $150 and $200 to have your thermostat replaced. The labor should be around $125, while parts should cost you, on average, about $45.
What is trouble code p0128?
P0128 is a diagnostic trouble code (DTC) for “Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)”.
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 are the symptoms of a bad engine coolant temp 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.