P0448 OBD II Trouble Code Evaporative Emission Control System Vent Valve/Solenoid Circuit Shorted

Detailed information on diagnosing and repairing a P0448 DTC code which refers to an electrical short with the EVAP vent valve circuit.

Symptoms of P0448 OBD II Trouble Code

  • Faulty vent valve
  • Wire/circuit issue
  • PCM fault

Common Causes of P0448 OBD II Trouble Code

  • 2007 subaru impreza (p0448)Hi, im in need of some help...short on cash..but plenty of time.. Purchased this from private owner. At that time no cel. Took to have emmissions per state request ...failed P0448! Still no cel... Took it to Subaru dealer....inspect found ,the ECM is shorted, found the evap canister vent selenoidis... 
  • code p0448 on 2011 nissan frontierMeasured the voltage going to the vent control vent valve and only has 10.85 volts. Is that enough to operate the vent valve properly?... 
  • 2004 dodge ram 1500 p0448Only idles for few minutes in cold weather before engine stalls starts right back but does same thing wont idle on own till engine warms up...