Why is P0128 still around after changing thermo?

20

Asked by Jun 17, 2015 at 01:35 PM about the 2007 Mazda MAZDA3 s Touring Hatchback

Question type: Maintenance & Repair

Hey guys I'm a 2007 Mazda3 Hatchback owner looking for some help with a trouble
code. Hope you guys can solve my problem.

I had codes P0126 and P0128 pop up. I like to do work myself to save money so I did
my research and after diagnosing the problem, I realized I need to replace the
Thermostat and the Engine Coolant Temperature Sensor.

After proper installation, P0126 went away, but P0128 stuck around. I thought it might
just need to be cleared so I cleared the code myself, only to find it kept popping back
up. So I took it to my neighborhood mechanic and he told me that the monitors had to
be reset at a Mazda dealer.

The other day I took it to the Mazda dealer and they reset the monitors which cleared
the trouble code... until about 45 miles later the code came back.

I have run diagnostics to see if the engine is reaching the correct temp. After 5-10
minutes of idol I am reading 170-190 degrees near the place where the engine meets
the thermostat and about 205 degrees at the top of the engine.

I'm truly stuck here and late on my smog check for my vehicle registration. Any help
would be appreciated, thank you!

1 Answer

254,645

http://www.obd-codes.com/p0128

3 of 3 people found this helpful.

Your Answer

Mazda MAZDA3 Experts

  • #1
    Tom Demyan
    Reputation
    400
  • #2
    Richard Boettger
    Reputation
    240
  • #3
    Tracy Hooks
    Reputation
    150
View All

Related Models For Sale

Used Mazda MAZDA6
166 Great Deals out of 11,000 listings starting at $1,599
Used Honda Civic
781 Great Deals out of 73,002 listings starting at $1,400
Used Toyota Corolla
879 Great Deals out of 56,699 listings starting at $1,488
Used Honda Accord
1,089 Great Deals out of 61,521 listings starting at $1,099
Used Ford Focus
746 Great Deals out of 52,776 listings starting at $999
Used Toyota Camry
1,023 Great Deals out of 73,437 listings starting at $295
Used Mazda MAZDASPEED3
10 Great Deals out of 356 listings starting at $4,995
Used Hyundai Elantra
483 Great Deals out of 42,673 listings starting at $2,295
Used Nissan Altima
958 Great Deals out of 75,068 listings starting at $1,300
Used Volkswagen Jetta
575 Great Deals out of 35,861 listings starting at $1,000
Used Subaru Impreza
175 Great Deals out of 19,643 listings starting at $2,200
Used Mazda MAZDA5
43 Great Deals out of 1,200 listings starting at $2,700

Used Cars For Sale

2016 Mazda MAZDA3 s Touring Hatchback For Sale
13 listings starting at $19,995
2015 Mazda MAZDA3 s Touring Hatchback For Sale
53 listings starting at $14,798

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.