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DTC P0069; Pcm Manifold Absolute Pressure/Atmospheric Pressure Correlation Problem: Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSE

DTC P0069:00 Manifold absolute pressure/atmospheric pressure correlation problem
DETECTION CONDITION
  • The PCM monitors the difference between the intake manifold vacuum and the atmospheric pressure. If the difference is below -12 kPa {-0.12 kgf/cm2 , -1.7 psi} or above 12 kPa {0.12 kgf/cm2 , 1.7 psi} when the following conditions are met, the PCM determines that there is a MAP sensor performance problem.

    MONITORING CONDITIONS

    • 12-15 s from when ignition is switched off.

    Diagnostic support note

  • This is a continuous monitor (CCM).
  • The check engine light illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
  • PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
  • FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
  • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION Not applicable
POSSIBLE CAUSE
  • MAP sensor malfunction
  • BARO sensor (built-into PCM) malfunction
  • PCM malfunction
SYSTEM WIRING DIAGRAM Not applicable
CAUTION:
  • Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.

Related PIDs

Item (definition) Unit/Condition Definition Condition/Specification (Reference)
BARO KPa {MPA}, mBar {BAR}, psi, in H20 Actually measured barometric pressure input from barometric pressure sensor built into PCM
  • Displays BARO
V BARO sensor voltage
  • Ignition switched ON (at sea level): Approx. 4.08 V
MAP KPa {MPA}, mBar {BAR}, psi, in H20 Manifold absolute pressure
  • Displays MAP
V MAP sensor voltage
  • Ignition switched ON (engine off) (MAP:101 kPa {1.03 kgf/cm2 , 14.6 psi}): Approx. 4.07 V
  • Idle (after warm up) (MAP: 33 kPa {0.34 kgf/cm2 , 4.8 psi}): Approx. 1.34 V
  • Racing (engine speed is 2, 000 rpm) (MAP: 26 kPa {0.27 kgf/cm2 , 3.8 psi}): Approx. 1.05 V
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