P0129 OBD II Trouble Code Barometric Pressure Too Low

Symptoms of P0129 OBD II Trouble Code

  • Excessively rich fuel delivery conditions
  • General lack of engine performance
  • Hesitation upon acceleration
  • Black smoke from exhaust
  • Diminished fuel efficiency

Common Causes of P0129 OBD II Trouble Code

  • Corroded connector face at the MAF/BPS sensor
  • Insufficient engine vacuum due to engine wear, an ignition misfire or clogged catalytic converter
  • Faulty BPS
  • Open or shorted wiring for the MAP sensor and/or the BPS
  • Insufficient system ground at the MAF/BPS
  • Defective PCM or PCM programming error

Severity of P0129 OBD II Trouble Code

Symptoms of a P0129 code may include: