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The code P0 400, in your Chevrolet Geo tracker, is a reference to the ABS braking system not working properly. In most cases when the ABS braking system is not working properly you will need to change the sensor.
Locked meaning blown?,no quick fix.
what the hell is cas
buy a new one
you replace it
The IAT Sensor on a 1992 Geo Tracker is the Intake Air Temperature Sensor. Replacing the air filter might fix this problem.
Repair kit availale at most auto parts stores
Sounds like your bands are shot, this is an expensive repair.
Disconnect the negative cable from the battery for about one minute and the light goes off, if the light comes on again you must use an scanner and find out which code you have to fix the sensor that sends that code from emissions system.
You must have to get a new or used (acceptable condition)rotor or hub if separated.
Code P0400 means EGR insufficient or excessive flow detected Code P0440 means Evap system leak
code 22 needs (engine coolant temperature sensor replaced) don't know about the 25