P0078 OBD II Trouble Code Exhaust Valve Control Solenoid Circuit (Bank 1)

Symptoms of P0078 OBD II Trouble Code

  • Check engine light illuminated (Malfunction indicator lamp)
  • Vehicle may suffer from poor acceleration and decreased fuel economy.

Common Causes of P0078 OBD II Trouble Code

  • Wire harness poor connection or corroded terminals
  • Faulty control solenoid
  • Short to power
  • Short to ground
  • Faulty ECM