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2023 HONDA ACCORD
1.5L I4 Turbo•FWD•CVT•gas•turbo
5 active safety recalls on this vehicle — view recalls
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Repairs402Labor489Torque3331Fluid7DTC1574Battery1Maintenance0Recalls5
P0129low severityPowertrain

Barometric Pressure Too Low

on 2023 Honda Accord 1.5L I4 Turbo · FWD

What this code means

The barometric pressure sensor is reporting a value that is lower than expected. This affects fuel and timing calculations.

Symptoms

  • Check engine light on
  • Poor fuel economy
  • Hesitation or rough running

Common causes

  • Faulty barometric pressure sensor
  • Vacuum leak affecting MAP reading
  • Wiring or connector fault
  • Faulty PCM

Diagnostic steps

  1. Read barometric pressure value with scan tool
  2. Compare to known local barometric pressure
  3. Inspect sensor wiring and connector
  4. Replace sensor if faulty
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