P0705 Transmission Range Sensor Error Question
03-11-2019, 01:21 AM
#1
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P0705 Transmission Range Sensor Error Question
Hi All,
Recently experienced transmission limp mode / CEL / semi-locked shifter issue on my 2005 C230 the other day. Currently the dashboard shows the transmission in D (drive) independent of the position of the shifter with "Sport" / "Comfort" indicator blank. ODB read P0705 (Transmission Range Sensor) error.
Common Causes:
-TCU (Not filled with oil, thank god)
-Shifter assembly position switch / PCB <--Likely candidate
My question:
Out of curiosity, I disconnected the shifter position wire harness and turned the key on. The dash STILL indicated the car was in "D" (Sport / Comfort indicator was blank).
Ben
Recently experienced transmission limp mode / CEL / semi-locked shifter issue on my 2005 C230 the other day. Currently the dashboard shows the transmission in D (drive) independent of the position of the shifter with "Sport" / "Comfort" indicator blank. ODB read P0705 (Transmission Range Sensor) error.
Common Causes:
-TCU (Not filled with oil, thank god)
-Shifter assembly position switch / PCB <--Likely candidate
My question:
Out of curiosity, I disconnected the shifter position wire harness and turned the key on. The dash STILL indicated the car was in "D" (Sport / Comfort indicator was blank).
Does it make sense that the open circuit behavior would display "D" on the dashboard without the position switch connected?
Could this indicate a TCU issue, or am I just being paranoid?
Thanks in advance!Ben
03-14-2019, 05:46 AM
#2
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Shifter assembly position switch / PCB <--Likely candidate
Been there done that....
search my old threads 2 or 3 years ago.
Been there done that....
search my old threads 2 or 3 years ago.
04-09-2019, 12:47 AM
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C230 Sport
You were right...Thanks for the extra confidence in the diagnosis. Bought a new assembly for $500 off "newparts" and swapped it in about 1.5hr and we were back in business.
Thanks!
You were right...Thanks for the extra confidence in the diagnosis. Bought a new assembly for $500 off "newparts" and swapped it in about 1.5hr and we were back in business.
Thanks!
