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OBD II Fault Code P0812 :

Description of Fault code P0812

REVERSE SW PERFORMANCE

Possible failuer P0812

  • Signal line open
  • Reverse switch (ATPRVS) failure of A/T range switch
  • The shift linkage adjustment is defective.

Diagnostic Procedure using AutoHex II Scan Tool

  • The PCM/ TCM monitors the actual mainshaft speed (rpm) and countershaft speed (rpm) ratios and the commanded ratio. The PCM/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 3rd -> 4th upshift has been made then the PCM/TCM detects neutral position while driving in 5th gear a 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) ratios and the commanded ratio. The PCM/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 3rd -> 4th upshift has been made then the PCM/TCM detects neutral position while driving in 5th gear a malfunction is detected.

MIL Status

  • OFF

Changing Dmaged DME in F Series


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

More Fault codes:

OBD II Fault Code P0813
OBD II Fault Code P0814
OBD II Fault Code P0815
OBD II Fault Code P0816
OBD II Fault Code P0817
OBD II Fault Code P0818
OBD II Fault Code P0819
OBD II Fault Code P081A
OBD II Fault Code P081B
OBD II Fault Code P081C
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