Code 69...help

[eliazar805]

69 Cooling Fan Engine Coolant Temperature (ECTF) Sensor this is what my friend's newly bought probe is reading when I scanned the engine for codes. Its a 1993 probe gt automatic. It also comes up with the light that says O/D off all the time. any help would be

[NickR]

The 93 has a separate coolant temperature sensor which controls the fans. It is located next to the coolant filler cap, beside the oil dipstick. If it's bad, or disconnected, it gives code 69. Check and clean the connection. If you still get 69, replace the sensor. I strongly recommend going to a Mazda dealer to get a new sensor. Tell them you have a 93 MX6 LS, and make sure they know it's the fan sensor, not the main coolant temperature sensor. A lot of people get the wrong part. To replace it, let the engine cool, no need to drain radiator (you will only lose a cupfull of coolant max), unscrew old sensor, screw in new sensor, and reconnect. A large spark plug socket fits (sloppily), and saves you buying a long socket.

Can't help with the OD light.

[eliazar805]

THanks Nick! I will check this out firs thing tommorow morning

[Dan [Sac]]

Also if it has had an engine swap with a 94+ motor it will throw this code as the '93 ECU will look for the sensor input (mentioned above) and not get any. It turns on both fans as a failsafe.

[eliazar805]

Also if it has had an engine swap with a 94+ motor it will throw this code as the '93 ECU will look for the sensor input (mentioned above) and not get any. It turns on both fans as a failsafe.

The car has the stock engine so I can scratch that out. Thanks for the advice guys!