It could be anything, but the most common problem is the O2 sensor.
Check out toyotanation.com They have a forum dedicated to paseo,tercels,startlets They also have a common engine swap guide there.
If its from the engine bay, check the serpantine belts, and the timing belt. My old Toyota paseo had a bad serpantine belt and it did squeak alot. Also check all the pulleys make sure theyre not wobbly.
Low fluid levels in engine.
The oil capacity should be 3 quarts w/ oil filter. That is for the engine oil. Check your owners manual and use the index to look for service specifications. I have a 96 paseo. It is a 5E-FE motor. This should be the same for your vehicle.
There is no way to know without reading the code. Use a code scanner to figure out what's wrong. They are available at auto parts stores and are quite easy to use. Note: The paseo uses the old type of electronics so you have to go to a shop that has a reader for all types of computers. Auto Zone and other "free" reading places will probably not be able to assist you . There is a question called you can find out the manual way to read the code. See Check engine light came on 1991 Toyota passeo? Be patient!
The 1994 Toyota Tercel and Paseo generally share similar engine management systems, but they do not use the exact same ECU. While both vehicles may have compatible components, the ECU is specifically tuned to the respective engine and vehicle configurations. It's always best to check the part numbers and specifications for compatibility if you're considering swapping or replacing the ECU between the two models.
To replace the thermostat in a 1996 Toyota Paseo, first, ensure the engine is cool and disconnect the negative battery cable. Remove the upper radiator hose from the thermostat housing, then unbolt the housing to access the thermostat. Replace the old thermostat with the new one, ensuring the rubber O-ring is properly seated, and reassemble the housing and hose. Finally, refill the coolant, start the engine, and check for leaks.
Check the temp sensor. The control is not turning on the fan when engine temp requires it, so the most common cause is the sensor.
To change the timing on a 1992 Toyota Paseo, first, ensure the engine is off and cool. Remove the timing belt cover to access the timing belt and the timing marks on the crankshaft and camshaft. Align the timing marks to the correct positions as specified in the service manual, then adjust the tension of the timing belt accordingly. Reassemble the cover and ensure everything is secure before starting the engine to check for proper timing.
you can run a ignition diagnostics to check the alternater, starter and the battery, if it wont start, its probably somewhere in one of those
The fuel pump relay on a 1992 Toyota Paseo is typically located in the engine compartment, specifically in the fuse box. You may need to check the diagram on the fuse box cover to identify the exact position of the relay. Alternatively, it can sometimes be found under the dashboard near the steering column. Always consult the vehicle’s service manual for precise details.
To read the OBD-I codes on a 1994 Toyota Paseo, you need to locate the diagnostic connector, typically found under the dashboard near the driver's side. Use a jumper wire to connect terminals TE1 and E1 on the connector. Then, turn the ignition key to the "ON" position without starting the engine; the check engine light will blink the trouble codes. Count the blinks to decipher the codes, which will indicate any issues with the vehicle's systems.