POST UPDATED IN November, 2021

Description of DTC code P0442 Generic

The engine control module (ECM) checks the evaporative emission control system (EVAP) for these situations:

  • Some kind of leak.
  • Excess vacuum.
  • There is a flow of purges under uncommanded conditions.
  • Fuel level and pressure sensors are failing.

Symptoms of fault code P0442 Generic

  • The Check Engine light is on.
  • There is an odor of fuel caused by the release of vapors.

Causes of OBD2 P0442 Generic

A code P0442 may have one or more of the following problems:

  • The fuel cap is incorrectly positioned or it does not correspond to the vehicle.
  • There may be a foreign element in the fuel filler cap.
  • A leak in the fuel tank.
  • The EVAP system may have some defective hose or tubing.

Possible solutions of the DTC code P0442 Generic

To solve the DTC code P0442, you can check the following components:

  • Check that the fuel filler cap is not loose, this is one of the most common causes that trigger this code.
  • Then, delete the codes and drive the vehicle for one day, and check if the code does not reappear.
  • Check the EVAP evaporative emissions system, and check for component failure.


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