The Chevrolet coolant temperature sensor difficulty remains one of those worries that can mimic or command you to believe other troubles exist through the vehicle. The perfect example is as soon as this part sets a code P0128 in memory.

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The problem code represents coolant temperature below thermostat regulation temperature. That"s the official an interpretation from my OBD II diagnostic code book. Retrieving this trouble code could lead friend to think it"s time to change the thermostat.A quick search on the Internet might lead you to think that you must replace the water pump. It"s basic to buy into this kind of fast diagnosis. Specifically since, difficulties with the water pump and also finding it vital to replace the thermostat top top vehicles through over 100,000 miles remain commonplace.

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

In this post we"ll talk around how to determine the coolant temperature sensor is actually the problem with the vehicle and also not the various other possibilities that exist.

Above you"ll check out the component ar diagram for the coolant sensor. If you can uncover the number one spark plug boot you"ll uncover the sending unit. You"ll require a 19 mm deep socket, however a 3/4 standard size likewise works.

Another point to mention, in this article we"re concentrating top top the Chevrolet V-8 engine. This has the 4.8 L, 5.3 L and also the 6.0 together workhorse engines. V that said, the coolant temperature sensor debated in this article finds its means into numerous other Chevrolet, Buick and GMC van engines.

Chevrolet Coolant Temperature Sensor Symptoms

First, let"s clean the air and state that this details Chevrolet coolant temperature sensor is not known for its too much reliability. This doesn"t median that every automobile that has one needs one replaced, but it appears that very couple of of this trucks will make it through its natural life cycle with the original coolant temperature sender installed. What we likewise need to make clear is the symptoms associated with the poor Chevrolet coolant temperature sensor have the right to vary greatly. Allow me usage the an initial and second vehicles that aided me find this common break down as prime examples of the differed symptoms. The an initial Chevy truck was a 2003 Silverado with a 5.3 l V-8 engine. The client complained the check engine light was on, the van ran poorly and stalled periodically at idle. This is the automobile that set the P0128 for the engine coolant temperature listed below threshold. As soon as I traction the data stream increase on mine automotive scanner the coolant temperature check out -30°F. The existing outside temperature continued to be in the low 80s.


If you deserve to imagine the distinction in the fuel mixture required to operation an engine in ~ -30°F than at 80°F climate you can understand why this truck ran poorly and also stalled. Here"s the allude I wanted to do on this specific problem. This Chevrolet truck had a bad crankshaft sensor 6 months ago. The driver feeling the symptom of the coolant temperature issue and that of the crank sensor trouble remained similar in nature. In fact, when the customer dubbed me to set up the meeting they said they believed the crank sensor was going negative again. On the 2nd vehicle a 1999 Chevrolet Tahoe, the driver"s complaint ended up being a waiting conditioning mechanism not cooling properly. The owner also stated the engine cooling fan ran all the time on part days. The root reason of the worry pointed back to the Chevrolet coolant temperature sensor. This is among those defective computer system monitored sensors that have the right to lead you under the wrong path of diagnosis through a misleading symptom list.

Replacing the Chevrolet Coolant Temperature sending Unit

The an initial thing we must briefly comment on becomes the location of the Chevrolet coolant temperature sensor.

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

On the V6 models it"s a tiny further back. Obviously, you must never attempt this DIY auto repair procedure on a warmth engine. Once the engine is cold you will need to decide on whether to drain some coolant off. As soon as you remove the old sensor you’ll lose some Dexcool expanded life antifreeze quickly. If you can get the new part threaded in ~ a few seconds, friend won"t shed that much antifreeze.

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With the said, ~ above high usage engines, now might be a good time to carry out a precautionary maintenance organization at the very same time. Hence we introduce draining out the old coolant. Note that both the manufacturing facility installed Chevrolet coolant temperature sensor and the replacement component have thread sealer currently installed top top the threads. The main size the the sending out unit is a 19 mm wrench or socket. However, if you don"t have a metric wrench in that large size you have the right to use a conventional three-quarter inch mix wrench or socket.If friend curious to view what the takes to change the Chevrolet coolant temperature sensor a gentleman on YouTube put together a video clip showing you how. If you want to watch what else us cover below on the deal with my old journey website visit the residence page.