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Home >> Mazda >> 2024 >> CX-30 Preferred >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (On-Board Diagnostic - Engine Control (VIN Y) (4 Of 6)) >> DTC P0471-00: Exhaust Gas Pressure Sensor Circuit Range/Performance Problem

DTC P0471-00: Exhaust Gas Pressure Sensor Circuit Range/Performance Problem

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P0471-00: (PCM - VIN Y) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location Exhaust gas pressure sensor circuit range/performance problem
Detection condition
  • Any one of the following conditions is met:
    • The condition has continued in which difference in barometric pressure measured and turbocharger/supercharger boost pressure is standard or more, difference in manifold absolute pressure and turbocharger/supercharger boost pressure is standard or more and difference in turbocharger/supercharger boost pressure and exhaust pressure is standard or less.
    • The condition has continued in which difference in barometric pressure measured and turbocharger/supercharger boost pressure is standard or less, difference in manifold absolute pressure and turbocharger/supercharger boost pressure is standard or less and difference in turbocharger/supercharger boost pressure and exhaust pressure is standard or more.

Precondition 
  • Ignition switched off: 12-15 min have elapsed
  • The following DTCs are not detected:
    • MAP sensor: P0107-00: and P0108-00:
    • Boost pressure sensor: P0237-00: and P0238-00:
    • Exhaust gas pressure sensor: P0472-00: and P0473-00:
    • BARO sensor: P2228-00: and P2229-00:
Fail-safe
  • Inhibits the EGR control.
Possible cause
  1. Exhaust gas pressure sensor connector or terminals malfunction (see CONNECTOR INSPECTION .)
  2. Exhaust gas pressure sensor malfunction (Refer to EXHAUST GAS PRESSURE SENSOR INSPECTION (VIN Y) in the service information.)
  3. PCM connector or terminals malfunction (see CONNECTOR INSPECTION .)
  4. PCM malfunction (Refer to applicable PCM REMOVAL/INSTALLATION (VIN Y) in the service information.)
Repeatability verification procedure
  1. Clear the DTC recorded in the memory. (see CLEARING DTC .)
  2. Replicate the vehicle conditions at the time the DTC was detected using the following procedure.
    • Leave the vehicle for 6 hours or more.
    • Start the engine and idle it for 1 min.
  3. Perform the DTC inspection for the PCM. (See DTC INSPECTION .)
System wiring diagram
  • Not applicable
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