Dtc #72
Thread Starter
5th Gear
Joined: Dec 2006
Posts: 5
Likes: 0
From: Chicago Illinois
Dtc #72
I have a 94 Ragtop Vette With a trouble code #72 VEHICLE SPEED SENSOR LOSS. Can anyone tell me what is in need of repair?
Last edited by dens cvette; Dec 23, 2006 at 10:13 PM.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
Have not had this problem myself yet. Vehicle speed sensor in transmission might be dirty and need to be cleaned out. Should have 5 volts on pin A of the sensor, pin B is ground. PCM could cause the problem or connection to CCM or CCM.
Is there anything not working like the cruse, speedometer or do you just have the DTC.
Is there anything not working like the cruse, speedometer or do you just have the DTC.
Last edited by pcolt94; Dec 23, 2006 at 10:49 PM.
Thread Starter
5th Gear
Joined: Dec 2006
Posts: 5
Likes: 0
From: Chicago Illinois
Thanks for the responses. Everything is working just found the trouble code. Second, I am a rookie to the trouble codes, used the trick to short out pin #4 and 12, not sure what module that would be. Codes where preceeded by H. I was told to clear the codes and see if they re-appear, what do you think?
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
I believe code 72 would be in module 4 which relates to the PCM which where the speed sensor connects to. H means it is an historic code and not a current code which can also relate to number of ignition cycles. Sometimes codes pop up but without an time line data is less meaningful. Check again see if anything else pops up. If you get a C12 that is normal which means no codes in module 1 relating to the CCM. 
