Mkardos Posted on Nov 23, 2013

2009 acadia dash says engine hot AC on is this the thermistat engine temp still on dash is cold if so where is the thermistat located...I have not looked yet?

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Ed k

Contributor 34 Answers
Posted on Feb 17, 2014

Ed k

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Low on coolant- water pump leaking- see dealer for special warranty policy to cover this for free

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gavin jones

1508 Answers
Posted on Apr 17, 2010

SOURCE: I have no low beams on my 2009 Acadia. Fuses are

could be two blown bulbs or the control switch

Marvin

85242 Answers
Posted on Oct 26, 2010

SOURCE: '08 silverado. dash board diplays, engine running

P0128 OBD-II Trouble Code Technical Description

Coolant 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.
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebook Symptoms

You will likely not notice any drivability problems other than the MIL illumination.

Causes

A 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

Possible Solutions

Past experience indicates that the most likely solution is to replace the thermostat. However here are some suggestions on troubleshooting and repairing a P0128 OBD-II code:

Verify coolant strength & level
Verify proper cooling fan operation (check if it's running more than it should). Replace if necessary.
Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary.
Verify proper intake air temperature (IAT) sensor operation, replace if necessary.
If the above items check out good, replace the thermostat

Jonah Oneal

14092 Answers
Posted on Jun 27, 2011

SOURCE: 2009 gmc acadia engine light came on also message

HAVE VECHICLE CODE SCANNED.YOU HAVE PROBLEM THE THE EMISSIONS AND ENGINE EVAPORATIVE CONTROL SYSTEMS.

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2009 acadia dash says engine hot AC on is this the thermistat engine temp still on dash is cold if so where is the thermistat located...I have not looked yet?

1 Answer

Ed k