Question about 2001 Volvo S60

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Obd po128 what is this particular problem

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That is a code meaning that your coolant temperature is too low below threshold. 9 times out of 10, you need a new sensor. It is the CTS (coolant temp sensor), or called your engine temperature sensor. Hope thats helpful

Posted on Mar 12, 2009

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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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03gmc envoy showing code p1514 and reduced power light on engine shuts down


Type: OBD & your codes

OBD PO 440
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Codes have nothing to do with installing parts

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What would your first step be if a 2005 chevy trailblazer has three codes po128 po410 po014


Google your codes & read up

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The way you work on any vehicle ,is to have factory service
manuals with trouble charts to follow

You need a professional scan tool, almost always ,to get not
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Aug 10, 2014 | 2005 Chevrolet TrailBlazer

1 Answer

2004 trailblazer code po128


P0128:
P0128 OBD-II Trouble Code
Technical DescriptionCoolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

What does that mean?This means that the engine's PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 code is to indicate a faulty thermostat. Similar codes: P0125

In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant temperature (ECT) sensor reading, and the speed of the vehicle.

CausesA code P0128 may mean that one or more of the following has happened:

Low engine coolant level .
Leaking or stuck open thermostat .
Faulty cooling fan (running too much) .
Faulty coolant temperature (ECT) sensor.
Faulty intake air temperature (IAT) sensor .Here's a link on replacing your thermostat.

Feb 06, 2013 | 2004 Chevrolet TrailBlazer

2 Answers

I got a PO128 reading I changed the theromstat but the engine light is still on what can I do to get the light off


When the Check Engine light comes on,you need to clear the code, either use a scan tool to clear the code or you can use 3 consecutive ignition cycle,that the diagnostic runs and not fails, Or A history of 40 consecutive warm up cycles if no failure are reported by this or any other emission relateddiagnostic, If the relacement thermostat and you cleared the close and this code appears You need to inspect the ECT sensor or even the ECT harness

Nov 26, 2012 | 2005 Chevrolet Equinox

1 Answer

Po128 code on 2002 kia rio


it mite be a o2 cencer

Nov 24, 2011 | 2002 Kia Rio

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