OBD II Fault Code P0744 :

Description of Fault code P0744

SHIFT MALFUNCTION L

Possible failuer P0744

• Shift valve E stuck

Diagnostic Procedure using AutoHex II Scan Tool

• The PCM /TCM monitors the actual mainshaft speed (rpm) and countershaft speed (rpm) ratio and the commanded ratio. The PCM or TCM computes these ratio continuously.
• A malfunction is detected when a difference between the actual ratio and the commanded ratio occurs, and it is over the specific ratio.
• When the PCM or TCM detects 5th gear position against 1st gear position commanded, then driving in 3rd gear to the command to drive in 3rd gear position correctly by the PCM or TCM. Then the malfunction is detected

Test Conditions using AutoHex tester

• D or D3 shift position
• Battery Voltage > 11V
• Upshifting 1st through 5th

Clear Fault codes Conditions

• The PCM /TCM monitors the actual mainshaft speed (rpm) and countershaft speed (rpm) ratio and the commanded ratio. The PCM or TCM computes these ratio continuously.
• A malfunction is detected when a difference between the actual ratio and the commanded ratio occurs, and it is over the specific ratio.
• When the PCM or TCM detects 5th gear position against 1st gear position commanded, then driving in 3rd gear to the command to drive in 3rd gear position correctly by the PCM or TCM. Then the malfunction is detected

MIL Status

• OFF

Note:

• AutoHex II is a professional Auto diagnostic.
• This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
  To get the accurate fault code description you may use AutoHex II

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