Mazda 6 Facelift 2005 Training Manual page 81

Engine
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If the value measured by the DPF differential pressure sensor is below a certain limit, the
DPF is recognized as being damaged. Then the PCM stores a corresponding DTC,
illuminates the MIL and activates the limp home mode.
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In this case, the DPF differential pressure sensor should be checked first. Call up the
Datalogger of the PCM and select the PID EXHPRESS_DIF (Press). Then connect a
hand-operated pressure/vacuum pump to the upstream pressure line at the DPF, apply a
pressure of 30 kPa and monitor the PID (Parameter Identification). If the PID indicates
30 kPa, replace the DPF. Otherwise check the upstream pressure line and the DPF
differential pressure sensor.
Service Training Mazda6 Facelift
Diesel Engines
01-67