Yea my check eng light came on it is code po128 how do i fixes it
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.
SOURCE: chevy trailblazer check engine light
P0128 is coolant operating temperature operating too low. This can be contributed to the Thermostat stuck open or faulty electronic radiator fan clutch. This is common, I had the same issue and replaced the thermostat and fan clutch and had the clutch re-programmed (required) at the dealer. As for the P0410, check the air pump fuse, if blown it will set this code on. Also check the air pump hoses for water and cracks. Hopefully this helps!!
SOURCE: I have serv eng light on with code # PO172 , PO128
Code p0172 is MAF, vacuum leak, and fuel pressure.
You can see my TIPS on this site to help with the MAF.
Code p0128 is Low ccolant, ECT or the IAT.
code p0442 is your EVAP system.
Please let me know what you find.
SOURCE: what do I need to do to fix my 2005 trailblazer.
Change the coolant temperature sensor. If the code is still there, change the thermostat, it might be stuck open causing the engine to run cooler than it should.
Testimonial: "ty so much, could I ask where is the sensor ? Im sorry to be a bother..."
SOURCE: po128 code on 2001 corvette
replace the thermostat. computer sees engine is running too cool thermostat stuck open.
SOURCE: i have a 05 chevy
P0410
Definition
Secondary Air Injection System fault
Explanation
The air injection system is monitored for faults
Probable Causes
1) Circuit relay defective or fuse open
2) Check connector and wiring
3) AIR pump defective or hoses blocked
P0128
Fault Code Definition
Common Problems That Trigger the P0128 Code
As for the po128 I would replace the thermostat first. That is the problem 99% of the time.
Good Luck
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