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Code P0128

 
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xtremewhite99
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PostPosted: Mon Nov 11, 2013 12:29 pm    Post subject:  Code P0128 Reply with quote

I am just wondering I was driving yesterday and my 2004 Chevrolet Impala came up with this code P0128.
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Frank
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PostPosted: Mon Nov 11, 2013 3:05 pm    Post subject:   Reply with quote

Coolant temperature sensor. The sensors themselves can go bad, but the exhaust crossover runs right next to it and the wires also melt sometimes and short together.

It's on the bottom of the thermostat housing on the 3.8.

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xtremewhite99
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PostPosted: Mon Nov 11, 2013 5:01 pm    Post subject:   Reply with quote

is it okay too still drive like this for now. I still have heat and the engine runs at normal temps on the gauge cluster
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lostwrench
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PostPosted: Mon Nov 11, 2013 9:09 pm    Post subject:   Reply with quote

The accuracy of the temperature gauge is now in question.
The sensor is easily replaced.
You will lose some coolant.
Lightly coat the sensor threads with sealant.
Of course, this is all done with a cold engine.

And as Frank wrote, inspect the wires for heat damage.
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IffyG
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PostPosted: Tue Nov 12, 2013 12:20 pm    Post subject:   Reply with quote

Make sure you check out your coolant to be sure it is in good shape and you should be OK for a little while. Just make sure to take care of it.

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Pitch Black SS
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PostPosted: Tue Nov 12, 2013 12:49 pm    Post subject:   Reply with quote

also check for a stuck open t-stat.

I was throwing that code years back when I tried a drilled 180 t-stat. Wasnt getting up to temp in the right amount of time.

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xtremewhite99
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PostPosted: Tue Nov 12, 2013 5:54 pm    Post subject:   Reply with quote

today I was driving and the light went off and is not on again
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Irish_alley
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PostPosted: Wed Nov 13, 2013 2:36 am    Post subject:   Reply with quote

every winter i start to get the code. it will go away for a couple days. every now and then it will just come one then seams like if its driven for a while it will go back off

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