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

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The problem code means coolant temperature below thermostat regulation temperature. That"s the official an interpretation from my OBD II diagnostic code book. Retrieving this problem code could lead friend to think it"s time to change the thermostat.A fast search top top the Internet can lead you to believe that you have to replace the water pump. It"s simple to buy into this kind of fast diagnosis. Specifically since, difficulties with the water pump and finding it important to change the thermostat on vehicles through over 100,000 miles stay commonplace.

However, if the fail is through the Chevrolet coolant temperature sensor, replacing the thermostat and water pump i do not care a for sure waste that time.

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

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

Another point to mention, in this post we"re concentrating on the Chevrolet V-8 engine. This consists of the 4.8 L, 5.3 L and the 6.0 l workhorse engines. V that said, the coolant temperature sensor discussed in this post finds its means into plenty of other Chevrolet, Buick and also GMC van engines.

Chevrolet Coolant Temperature Sensor Symptoms

First, let"s clear the air and state that this particular Chevrolet coolant temperature sensor is not recognized for its excessive reliability. This doesn"t mean that every automobile that has one requirements one replaced, but it shows up that very couple of of these trucks will make it through its organic life cycle with the original coolant temperature sender installed. What we additionally need to make clear is the symptoms linked with the poor Chevrolet coolant temperature sensor can vary greatly. Let me use the first and second vehicles that aided me discover this common break down as prime examples of the varied symptoms. The very first Chevy truck was a 2003 Silverado through a 5.3 l V-8 engine. The customer complained the check engine light was on, the van ran poorly and also stalled periodically at idle. This is the automobile that set the P0128 for the engine coolant temperature below threshold. As soon as I pulled the data stream increase on my automotive scanner the coolant temperature check out -30°F. The existing outside temperature remained in the low 80s.


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If you deserve to imagine the difference in the fuel mixture compelled to operation an engine at -30°F 보다 at 80°F then you deserve to understand why this truck ran poorly and stalled. Here"s the point I wanted to do on this specific problem. This Chevrolet truck had actually a negative crankshaft sensor six months ago. The driver feeling the symptoms of the coolant temperature issue and that of the crank sensor problem remained similar in nature. In fact, when the customer referred to as me to set up the appointment they claimed they thought the crank sensor was going negative again. ~ above the 2nd vehicle a 1999 Chevrolet Tahoe, the driver"s complaint became a waiting conditioning device not cooling properly. The owner additionally stated the engine cooling fan ran all the time on some days. The root reason of the issue pointed back to the Chevrolet coolant temperature sensor. This is among those defective computer system monitored sensors that can lead you under the wrong route of diagnosis v a misleading symptom list.

Replacing the Chevrolet Coolant Temperature sending Unit

The first thing we should briefly talk about becomes the ar of the Chevrolet coolant temperature sensor.

On both the V6 4.3 together Vortec engine and the 4.8 L, 5.3 L and also 6.0 l V-8 engines, they locate the coolant temperature sensor top top the driver next cylinder head. Top top the V-8 models it"s next to the number one spark plug wire boot.

On the V6 models it"s a tiny further back. Obviously, you must never effort this DIY auto repair procedure on a warmth engine. When the engine is cold girlfriend will need to decide on whether to drainpipe some coolant off. Once you remove the old sensor you’ll lose some Dexcool prolonged life antifreeze quickly. If you can get the new part threaded within a few seconds, girlfriend won"t lose that much antifreeze.

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With the said, top top high usage engines, now could be a good time to perform a preventative maintenance company at the exact same time. Therefore we introduce draining the end the old coolant. Keep in mind that both the manufacturing facility installed Chevrolet coolant temperature sensor and also the replacement component have subject sealer already installed ~ above the threads. The official size of the sending unit is a 19 mm wrench or socket. However, if friend don"t have actually a metric wrench in that big size you can use a typical three-quarter inch mix wrench or socket.If girlfriend curious to check out what that takes to change the Chevrolet coolant temperature sensor a gentleman ~ above YouTube put together a video clip showing girlfriend how. If you desire to view what else us cover here on the resolve my old journey website visit the house page.