Help my P5 has an CEL Codes that says Thermostat

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P-Funk!

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Lancer Ralliart Sportback

• Jun 23, 2014

• #21

...and add a temp-adjustable switch for the engine fan. It should only be on when needed.

 

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tweety2300

Member

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2001 mazda protege mp3

• Jun 23, 2014

• #22

P-Funk! said:

...and add a temp-adjustable switch for the engine fan. It should only be on when needed.

Click to expand...

Mine are on constantly on my work car. Have been for 3 years now according to previous owner. No issues at all

 

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Bebotech

Member

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2002 MP5

• Jun 23, 2014

• #23

tweety so your Protg has the fans on all the time and it does not cause the CEL to come on?

 

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Bebotech

Member

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2002 MP5

• Jun 23, 2014

• #24

Replaced the thermostat and coolant sensor, now the car overheats. Any ideas?

 

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Bebotech

Member

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2002 MP5

• Jun 24, 2014

• #25

Bump

 

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ap123

Member

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03 Mazda Protege5

• Jun 24, 2014

• #26

Where did you buy the parts?
If you bought the parts from an auto part odds are one of the two part you replaced is defective.

its not uncommon for low quality thermostats not to open fully, and for coolant temperature sensor resistance to be off and cause incorrect readings

 

Last edited: Jun 24, 2014

P

P-Funk!

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Lancer Ralliart Sportback

• Jun 24, 2014

• #27

Try to bleed any air out of the cooling system.

Point the car uphill. When cool - remove the radiator cap. Run the engine to operating temp with the heater on full.

You should see bubbles/gulps of air. Refill to full and replace the radiator cap.

Drive. Watch the level in the overflow bucket and keep full.

 

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Bebotech

Member

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2002 MP5

• Jun 24, 2014

• #28

Great guys will do. While I am at it someone told me to turn on the heater inside the car when adding coolant is this true?

 

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Bebotech

Member

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2002 MP5

• Jun 25, 2014

• #29

It seems like the problem is fixed, not comes the good part. I am driving it for 50 miles in order to make sure the CEL does not come back on and I can get the car inspected. I am very pleased with the help I received from everyone. Thanks!!!!!!!!!!

 

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mp5la

Member

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2002 Mazda Protege 5

• Jun 25, 2014

• #30

Glad to hear it's fixed. Burping the air out of the system is critical with these newer engines and can take a little time. Just an FYI for next time, if you squeeze the upper and lower radiator hoses before you turn the car on until you feel a good amount of pressure in them it'll make the process go faster.

 

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Bebotech

Member

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2002 MP5

• Jun 25, 2014

• #31

Great to hear mp5la, thanks for the advise.

 

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Bebotech

Member

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2002 MP5

• Jul 2, 2014

• #32

Car is fixed and it passed inspection, finally legal to be driven on the PA roads. Thanks guys!!!!!!!!!!!!!!!!!!!!