I am having a code P0113 and the car is using up too much gas

codes are OBDll and are available on line free.

https://repairpal.com/obd-ii-code-p0102
https://repairpal.com/obd-ii-code-p0113
https://repairpal.com/obd-ii-code-p0700

Edited to tidy up the English, and the code is P-Zero, not P-Oh.

If your PCM is returning a P0113 error code, it means that your Intake Air Temperature (IAT) sensor is reading at too high of a voltage. This sensor works as a basic resistor. The PCM sends it a continuous current of five volts, and monitors how much voltage it gets back.

P0113 Code: Everything You Need To Know - Solo Automotive

Details and pictures in the link
https://www.google.com/search?q=Chevy+Cavalier+P0113

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the following links will assist with p0113
P0113 OBD II Trouble Code IAT Sensor Circuit High Input Problem... https://www.obd-codes.com/p0113 IAT Intake Air Temperature Sensor Diagnosis P1111 P1112 P0113

Intake air senor, did you plug it back in. On the plenum between the air filter and throttle body. They rarely go bad. If plugged in , check for a broken wire right behind the plug. they break inside the coating.

code p0113 does not refer to a MAF sensor so replacing that was a waste of money=== It refers to intake air temperature (IAT) sensor---circuit malfunction====causes --wiring open circuit/short circuit to positive--wiring short circuit to ground---ground wire defective---IAT sensor---ECM.
Replace the IAT and check the wiring is in good condition and the connectors are clean and tight.

P0113 intake air temp voltage too high
P0123 Throttle position sensor voltage too high
P0203 is injector #3 control circuit
voltage is higher that 4.9 volts short to 5 volt supply circuit

erase the codes and drive vehicle to see if the codes come back if they do you have a hard code check the supply circuit for a short

Here's code P0102.Here's code P0113.Here's code P0171.

P1361 HONDA - Top Dead Center Sensor 1 Intermittent Interruption
Possible causes- Top Dead Center Sensor 1 harness open or shorted
- Top Dead Center Sensor 1 circuit poor electrical connection
- Faulty Top Dead Center Sensor 1P0113 HONDA - Intake Air Temperature Sensor Circuit High Voltage

Possible causes- Dirty air filter
- Intake air temperature (IAT) sensor harness is open or shorted
- Intake air temperature (IAT) sensor electrical circuit poor connection
- Faulty intake air temperature sensor

P0113 -

Intake Air Temperature Circuit High Input

It looks like it is related to the IAT sensor or circuit.

For more info, go to this web site/link:

http://www.obd-codes.com/p0113

p1639 is low a/c refrig. so that's not it. p0113 is low intake air temp. which is telling the computer its -38 f. This can cause the idle to be raised. and p0401 is EGR flow test failed.
Can you post what motor this has 3.8 liter or the 3.4 liter. This is something that we need to know.