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Home >> Mazda >> 2022 >> CX-5 S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (On-Board Diagnostic - Engine Control System (VIN Y) (3 Of 7)) >> DTC P0234-00: Dynamic Pressure Turbo (Dpt) OVERBOOST Condition >> Details On DTCs

Details On DTCs

WARNING: This page is about a different variant/trim than selected.
DTC P0234-00: (PCM, VIN Y) DETECTION CONDITION AND POSSIBLE CAUSE

DESCRIPTION Dynamic pressure turbo (DPT) overboost condition
DETECTION CONDITION Determination conditions
  • As the result of comparing the actual air charging pressure with the limited pressure, the actual air charging pressure exceeds the limited air charging pressure for a continuous 2 s.
Preconditions
  • 2 s have elapsed with all of the following conditions met when DPF regeneration control is stopped during boost control feedback.
  • Engine speed: 500 rpm or more
  • The following DTCs are not detected:
  • Boost pressure sensor: P0237-00:, P0238-00:
    • BARO sensor: P2228-00:, P2229-00:
Drive cycle
Self test type
  • CMDTC self test
Sensor used
  • MAP sensor
FAIL-SAFE FUNCTION
  • Limits intake air amount. (Only period of time when PCM determines that air is excessively boosted)
VEHICLE STATUS WHEN DTCs ARE OUTPUT
  • Not applicable
POSSIBLE CAUSE
  • Erratic signal to PCM
  • MAP sensor signal malfunction
  • Input signal part connector or terminals malfunction
    • Input signal part related circuit malfunction
  • Vacuum piping or positive pressure piping of wastegate valve actuator malfunction
  • Air bypass valve malfunction
  • Wastegate valve position sensor malfunction
  • Wastegate valve actuator malfunction
  • Dynamic pressure turbo (DPT) malfunction
  • PCM malfunction