The cooling sensor, often referred to as the coolant temperature sensor, on a Mazda 626 is typically located near the engine block, usually on or near the thermostat housing. It is positioned to monitor the temperature of the coolant as it circulates through the engine. In some models, it may also be found near the cylinder head. Always consult the vehicle's service manual for the exact location, as it can vary by model year.
I had the same problem on my 98 Mazda 626 and the O2 sensor was faulty.....
where is the location of all o2 sensars in 99 Mazda 626
rggerger
The cooling fan relay on a 1998 Mazda 626 is located in the engine compartment near the firewall. It is housed in a protective box with latches.
Does your cooling fan work?
on the throttle body
Yes, it has a speed sensor, about $125 online.
On the 2000 626 it is directly under the air filter box.
Mazda 626 frm 1996 doesn't have O2 sensors, have you ECU/PCM inspected, it might have a minor damage.
probably the fan relay
the ABS sensor is bad.
It's part of the distributor