P0303 Mazda -i have this code reading on my cx-7 and my car will run for hot

Question

about 30 minutes into the drive the engine will start shaking and the engine temperature guage will quickly rise to hot. Any idea where this action falls under in possibilities?

Answer 1

Hi there,

This sounds like a possible head gasket issue. I would check the cooling system for signs of exhaust gasses in it. You can do this doing a combustion test or a leak down test. You may also have two separate issues going on, like a faulty ignition coil and a cooling fan issue.