exhaust gas recirculation flow insuficient
Trouble code P0401 means:Exhaust gas recirculation-insufficient flow detected
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Trouble code P0171 means:System too lean (bank 1)
Trouble code P0171 means :System too lean (bank 1)
The 1998 Mazda Protege 1 typically comes with a 1.5-liter engine option, which is a 16-valve engine. However, it may also be equipped with a 1.8-liter engine in certain trims or markets. To confirm the specific engine type, you can check the vehicle's specifications or the engine code.
you will have to get from Mazda or buy a used one
PO401 indicates an abnormal EGR flow.
If you mean PO660 it is Intake Manifold Tuning Valve circuit Malfunction. Click the link.
You need OBD2 reader or scanner to get the codes
you needs a dpfe sensor
Trouble code P0768 means: Shift solenoid D electrical problem
It means there is bad/no connection between the car's computer and the oxygen sensor after the catalytic converter.