Check Engine light - high coolant temp

[MD5]

I just had my first check engine light!

I was coasting downhill for a long duration, the situation was identical to the one below. The trouble code set is a P0126, the same as the others here have gotten. I reset the codes, and I will watch for it to trip the CEL again. However, I believe that this is an error that we are going to see when coasting downhill for more than 15 minutes.

"At the time the car had been pretty much coasting in 4th gear with RPM around 3500 for about half an hour, using the engine to keep the car at a good speed with minimal braking. Coolant guage never moved above normal (lower side of the middle)." jmcglynn

That's weird.

I have thrown two P0126 CELs and both times I was driving home from work (about 22 miles) when I let off the gas to coast down the exit ramp. Both times this is when the light came on.

 

[MD5]

i ordered a new coolant temp sensor, should be at my house tonight, i hope that fixes my P0126 code. i put a new thermostat in last week and it didnt fix the issue, so it has to be the sensor...i hope. My problem was the temp would dip once the rpms start going

Did you ever replace the thermostat???

 

[MD5]

Here's a thread from another forum. Cliff notes: DO NOT get a third party t-stat. Go with OEM Mazda.

http://**********************/index.php?topic=120362.0

 

[flcruising]

Can't post another forum here for some reason.

Try to repost with this - http://tinyurl.com/