I have a 2005 Mazda 3, 2.0 Liter, 116,000 miles on it. Check engine light came on so I ran the codes, it showed two, P0126 and P0128. I've done a little research on the internet and I'm thinking the the Thermostat is stuck open and needs to be changed. Is that right? Can someone help me out. Thanks. Cory
It's a pretty common failure for those codes on alot of differnet makes and models. I'd recommend a dealer thermostat to be sure you get the correct opening/operating temp
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