What does Evap mean on a code readout on a Chevy ?

Question

the code readout result is an evap and the check engine light was on, this is on a Chevy Cavalier, year 2001 ? It just says "Evap"

Answer 1

depending on what number you saw with that desription,  you can have about 25 different problems.

p0440 evaporative emission (evap) control system malfunction

p0441 evap system insufficient flow rate

p0442 evap system leak detected

p0443 evap system purge control valve  circuit malfunction  

p0444 evap system purge control valve circuit open

p0445 evap system purge control valve circuit shorted

p0446 evap system vent control circuit malfunction

p0447 evap system control valve circuit open

p0448 evap system control valve circuit shorted

p0449 evaporative emission (evap) vent solenoid control circuit

p0450 evap system pressure sensor malfunction

p0451 evap system pressure sensor range performance

p0452 evap  system pressure low output

p0453 evap  system pressure high output

p0454 evap  system pressure low input

p0455 evaporative emission (evap) system leak detected

p0456 evap system leak detected ( very small leak)

p0457 evap system leak detected ( fuel cap loose/off)

p0458 evap system purge control valve circuit low

p0459 evap system purge control valve circuit high

you need to find the exact number to define the problem.  

Answer 2

check your gas cap it's loose after tightening it up the code should go away after you clear it or drive for about 50 miles

Answer 3

evaporative emissions control systems- thats weird whats the code?