2006 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

DTC P0441: Notes

DTC P0441 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0441 Evaporative emission control system incorrect purge flow
DETECTION CONDITION 
  • PCM measures the purge line pressure, which is the vacuum when the following conditions are met. If vacuum between charcoal canister and intake manifold does not reach the specified value, PCM determines that the EVAP system has clogging.

    MONITORING CONDITION 

    • Engine speed 1,100-2,700 rpm 
    • Throttle opening angle 19.9% (at engine speed of 2,000 rpm) 
    • Vehicle speed 69.5-136 km/h (43.2-84.5 mph) 

Diagnostic support note 

  • This is an intermittent monitor (Evaporative system).
  • 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.
POSSIBLE CAUSE 
  • Purge solenoid valve malfunction
  • Evaporative emission system leak detection pump malfunction
  • Charcoal canister malfunction
  • Catch tank malfunction
  • EVAP hose damaged or loose
  • EVAP pipe damaged
  • 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.