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What is PO128 - Cars & Trucks

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What does po128 stand for

PO128 is code for Coolant temp is below thermostat regulating temp. Sounds that either the thermostat is missing or stuck open.

Hope this helps

Jun 02, 2015 | 2008 Pontiac G5

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Pontiac grand am I had a diagnostic reading at autozone for diagnostic codes po128,po440 and p1189 don't know what they mean for a 2003 Pontiac grand am gt 3.4 liter and v6 engine vehical

PO128 -- engine coolant low or thermostat not working
P0440 - EVAP system malfunction, gas cap loose - Cat convertors missing from car can cause this
P1189 - Engine Oil Pressure Switch Circuit -- CAT CONVERTORS MISSING FROM CAR can cause this.

Jan 28, 2015 | 2003 Pontiac Grand Am

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what was the error says when you get the code or look it up online code po128

Jul 07, 2014 | 2001 Buick LeSabre

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Trouble code p0106 / po128 / po300 / po606

po106 MAP/BARO sensor range preformance po128 thermostat range is below regulated temp po300 random engine misfire po606 PCM internal preformance error. some one has chipped there engine.

May 08, 2014 | 2008 Hummer H3

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Car won't start/shows code po128

replace sensor, top coolant, dis-connect battery for 5 minutes, re-connect and start

Apr 08, 2014 | 2003 Oldsmobile Alero

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Code po128 came up

Code 128 is for an engine that is not reaching normal temp, usually a thermostat problem.

Mar 02, 2013 | 2006 Pontiac Grand Prix

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Code 128 is for the engine not warming up to normal temp.
Usual problem is a faulty thermostat.

Jan 26, 2013 | Cars & Trucks

1 Answer

Po128 code on 2002 kia rio

it mite be a o2 cencer

Nov 24, 2011 | 2002 Kia Rio

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