2006 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

DTC P2227: Notes

DTC P2227 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P2227 EGR boost sensor circuit performance problem
DETECTION CONDITION 
  • The PCM monitors the differences between the intake manifold vacuum and atmospheric pressure at idle, which the EGR boost sensor detects by switching the EGR boost sensor solenoid. If the difference is 6.4 kPa {48 mmHg, 1.9 inHg} or below,  the PCM determines that there is an EGR boost sensor performance problem.

Diagnostic support note 

  • This is a continuous monitor (CCM).
  • The MIL 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 the first drive cycle.
  • FREEZE FRAME DATA is available.
  • DTC is stored in the PCM memory.
DTC P2227 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P2227 EGR boost sensor circuit performance problem
POSSIBLE CAUSE 
  • EGR boost sensor malfunction
  • EGR boost sensor solenoid malfunction
  • Loose, damaged, misconnected, clogged or frozen moisture in vacuum hose from EGR boost sensor solenoid to EGR boost sensor
  • Loose, damaged, misconnected, clogged or frozen moisture in vacuum hose from EGR boost sensor solenoid to EGR pipe
  • PCM malfunction
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.