what is the code p0128b for on the 2002 monte carlo?

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what is the code p0128b for on the 2002 monte carlo?

2007-03-17 08:23:53 · 3 answers · asked by 2thfarry 1 in Cars & Transportation ➔ Car Makes ➔ Chevrolet

3 answers

Most likely a bad thermostat.

P0128 ECT sensor Below Thermostat Regulating Temperature

Possible Causes
Check the operation of the thermostat (it may be stuck open)
ECT sensor is damaged or it has failed
Inspect for low coolant level or an incorrect coolant mixture
PCM has failed!

2007-03-17 08:28:34 · answer #1 · answered by TonynNC 5 · 0⤊ 0⤋

Coolant thermostat (coolant tempature below thermostat regulating tempature)

2007-03-18 10:16:36 · answer #2 · answered by skip1960 4 · 0⤊ 0⤋

ECT sensor out of range.

2007-03-17 15:39:54 · answer #3 · answered by know da stuff 4 · 0⤊ 0⤋