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Home >> Mazda >> 2021 >> CX-5 Sport, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (On-Board Diagnostic - Engine Control (VIN Y) (1 Of 3)) >> DTC P0234-00: Dynamic Pressure Turbo (Dpt) OVERBOOST Condition >> Details On DTCs

Details On DTCs

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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
  • 2
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