The Chevrolet coolant temperature sensor difficulty remains among those problems that can mimic or command you to think other troubles exist with the vehicle. The perfect instance is once this component sets a code P0128 in memory.

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The problem code stands for coolant temperature listed below thermostat regulating temperature. That"s the official definition from mine OBD II diagnostic password book. Retrieving this problem code might lead friend to believe it"s time to change the thermostat.A fast search on the Internet might lead you to believe that you need to replace the water pump. It"s straightforward to buy into this form of rapid diagnosis. Especially since, difficulties with the water pump and finding it vital to change the thermostat top top vehicles v over 100,000 miles stay commonplace.

However, if the fail is v the Chevrolet coolant temperature sensor, instead of the thermostat and also water pump becomes a for sure waste that time.

In this write-up we"ll talk around how to recognize the coolant temperature sensor is in reality the trouble with the vehicle and not the other possibilities that exist.

Above you"ll see the component place diagram because that the coolant sensor. If friend can discover the number one spark plug boots you"ll uncover the sending out unit. You"ll require a 19 mm deep socket, but a 3/4 conventional size also works.

Another thing to mention, in this article we"re concentrating ~ above the Chevrolet V-8 engine. This contains the 4.8 L, 5.3 L and also the 6.0 together workhorse engines. With that said, the coolant temperature sensor discussed in this short article finds its method into many other Chevrolet, Buick and GMC truck engines.

Chevrolet Coolant Temperature Sensor Symptoms

First, let"s clear the air and also state that this certain Chevrolet coolant temperature sensor is not well-known for its extreme reliability. This doesn"t average that every vehicle that has one demands one replaced, but it shows up that very few of these trucks will make it through its herbal life cycle v the initial coolant temperature sender installed. What we likewise need to make clear is the symptoms associated with the bad Chevrolet coolant temperature sensor can vary greatly. Permit me use the an initial and 2nd vehicles that assisted me uncover this common failure as prime examples of the varied symptoms. The an initial Chevy truck was a 2003 Silverado v a 5.3 together V-8 engine. The client complained the check engine light to be on, the truck ran poorly and also stalled sometimes at idle. This is the automobile that set the P0128 for the engine coolant temperature listed below threshold. Once I traction the data stream increase on my automotive scanner the coolant temperature review -30°F. The existing outside temperature stayed in the low 80s.


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If you have the right to imagine the difference in the fuel mixture forced to run an engine in ~ -30°F than at 80°F climate you have the right to understand why this truck ran poorly and stalled. Here"s the allude I wanted to do on this certain problem. This Chevrolet truck had actually a poor crankshaft sensor six months ago. The driver feel the symptoms of the coolant temperature issue and also that of the crank sensor trouble remained comparable in nature. In fact, once the customer called me to collection up the appointment they said they believed the crank sensor to be going poor again. Top top the second vehicle a 1999 Chevrolet Tahoe, the driver"s complaint ended up being a air conditioning mechanism not cooling properly. The owner also stated the engine cooling fan ran all the moment on some days. The root reason of the problem pointed back to the Chevrolet coolant temperature sensor. This is one of those defective computer monitored sensors that can lead you under the wrong path of diagnosis through a misleading symptom list.

Replacing the Chevrolet Coolant Temperature sending out Unit

The an initial thing we should briefly discuss becomes the place of the Chevrolet coolant temperature sensor.

On both the V6 4.3 together Vortec engine and also the 4.8 L, 5.3 L and also 6.0 l V-8 engines, they situate the coolant temperature sensor ~ above the driver side cylinder head. On the V-8 models it"s beside the number one spark plug cable boot.

On the V6 models it"s a small further back. Obviously, you must never effort this DIY auto repair procedure on a warmth engine. As soon as the engine is cold girlfriend will have to decide on even if it is to drainpipe some coolant off. As soon as you eliminate the old sensor you’ll shed some Dexcool expanded life antifreeze quickly. If you can get the brand-new part threaded in ~ a couple of seconds, friend won"t shed that much antifreeze.

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With the said, top top high mileage engines, now can be a an excellent time to carry out a precautionary maintenance organization at the same time. Hence we introduce draining the end the old coolant. Keep in mind that both the factory installed Chevrolet coolant temperature sensor and the replacement component have subject sealer currently installed on the threads. The main size that the sending out unit is a 19 mm wrench or socket. However, if girlfriend don"t have a metric wrench in that big size you have the right to use a standard three-quarter inch mix wrench or socket.If you curious to see what the takes to change the Chevrolet coolant temperature sensor a gentleman ~ above YouTube placed together a video showing friend how. If you want to check out what else we cover here on the deal with my old ride website visit the house page.