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Home >> Mazda >> 2003 >> B4000 Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1729 Or DTC P1781 >> Possible Causes

Possible Causes

Possible causes are:

Damaged Electronic Shift Control Module.
Damaged PCM.
Damaged 4X4L shift control switch.
Speedometer calibration.
4X4L harness open or shorted.

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