P0108 OBD II Trouble Code Manifold Absolute Pressure/Barometric Pressure Circuit High Input

Detailed information on troubleshooting and repairing a p0108 trouble code which refers to a high input in the maf sensor circuit. Also includes links to relevant forum topics on the code.

Symptoms of P0108 OBD II Trouble Code

  • MIL (Malfunction Indicator Lamp) will likely be on
  • Engine may run poorly
  • Engine may not run at all
  • Fuel mileage may decrease
  • Presence of black smoke at exhaust

Common Causes of P0108 OBD II Trouble Code

  • Bad MAP sensor
  • Leak in vacuum supply line to MAP sensor
  • Engine vacuum leak
  • Short on signal wire to PCM
  • Short on reference voltage wire from PCM
  • Open in ground circuit to MAP
  • Worn engine causing low vacuum