tech 2 error message
Thread Starter
Burning Brakes
Joined: Aug 2018
Posts: 1,097
Likes: 398
From: ARKANSAS
tech 2 error message
My Tech 2 (clone) is behaving badly. It basically times out when establishing communications. Error code scen1 ib .
2241
1
or it will say the Candid is not connected. It is connected and green light is on. But it does not click as usual when communicating.
Any ideas?
2241
1
or it will say the Candid is not connected. It is connected and green light is on. But it does not click as usual when communicating.
Any ideas?
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
Most common reasons for a No communication message is something that is interrupting the "path of communication" from the obd2 port
Normally it is caused by
1 an aftermarket stereo
2 an aftermarket alarm system
3 an aftermarket remote start system
4 GM hides the fuse to the obd2 port on the cigarette lighter circuit Check that fuse
Remove the Stereo fuse the stereo amp fuse and the INFO fuse if it has Onstar and try reading it again ALSO try to dis connect a battery lead + or - overnight and that will reset the ECM and remove any glitches it may have gotten over the years
Normally it is caused by
1 an aftermarket stereo
2 an aftermarket alarm system
3 an aftermarket remote start system
4 GM hides the fuse to the obd2 port on the cigarette lighter circuit Check that fuse
Remove the Stereo fuse the stereo amp fuse and the INFO fuse if it has Onstar and try reading it again ALSO try to dis connect a battery lead + or - overnight and that will reset the ECM and remove any glitches it may have gotten over the years
Thread Starter
Burning Brakes
Joined: Aug 2018
Posts: 1,097
Likes: 398
From: ARKANSAS
I just installed an aftermarket stereo and bypassed the stock system and amp. Could this be the cause? How do I get around it? It is a 2006 Base M6. The issue is a fault with ABS and Anti-lock brake service warning. I tried to reset it and it immediately returned. Then the Tech 2 started the communication issue. I disconnected battery for about an hour and that did not do it. I'll disconnect overnight. Thanks.
Thread Starter
Burning Brakes
Joined: Aug 2018
Posts: 1,097
Likes: 398
From: ARKANSAS
After cleaning and reconnecting cable the Tech II came back to life. I'm not sure what happened, but the ABS and traction control lights went off by themselves. I believe it was C0121. It also gave another code that has not reappeared that said "right sensor erratic readings." I cleaned that wheel sensor but the C0121 code kept reappearing. Until today. I expect it may return.
