P0105 OBD II Trouble Code Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction Engine Light Code

Detailed information on troubleshooting and repairing a p0105 automotive trouble code which refers to a malfunction in the MAP electrical circuit. Also includes links to relevant forum topics on the code.

Symptoms of P0105 OBD II Trouble Code

  • Poor running engine
  • Engine runs rich
  • Engine won't idle
  • Engine backfires through tailpipe
  • Engine misfire under load or at idle
  • MIL (Malfunction Indicator Lamp) illumination
  • In some extreme cases there may be no symptoms other than MIL illumination

Common Causes of P0105 OBD II Trouble Code

  • MAP sensor vacuum hose disconnected or plugged
  • Bad MAP sensor
  • Bad TPS
  • Damaged or problematic MAP sensor connector
  • Damaged or problematic TPS connector
  • Damaged wiring
  • Short to reference voltage on signal circuit of MAP sensor
  • Loss of ground to MAP sensor or TPS
  • Open on signal circuit of MAP sensor
  • Bad PCM