U0073, u0100, u0101, p0700,
10-19-2022, 06:10 PM
#1
On The Tree
Thread Starter
U0073, u0100, u0101, p0700, 2016 CTS V 45K miles no known addons, been doing this for 10K miles and 8 months or so. Otherwise run, drives fantastic.
Intermittently, however every day. Symptoms are mainly the 8-speed auto transmission locks up in one gear. From startup cold drive away to after 10 minutes shifting from 6,7,8, gear down to a lower gear maybe 3rd gear not sure. Won't shift up or down in any mode.
Secondary things that happen are numerous, but don't all happen each time.
1 Advanced front lighting flashes an alert in the right side of the IP.
2 stabilitrak, rear axle alert, power steering, traction light flashes on and off.
3 Park assist off, back up camera inoperable,
4 tachometer at idle flickering to a lower rpm. (The engine does very slightly studder)
5 oil temp from normal to 0 psi fast than it could actually happen.
6 coolant temp at the IP gauge falls from normal to low again to fast of a reaction to be accurate.
7 HUD changes from one setting to (speed limit to the radio station) another setting.
8 Briefly my scan tool reads no data. After a key cycle everything pops back up.
Have not had it looked at as yet
25 years of dealership Tune-up and Drivability under my belt but 20 years ago.
Intermittently, however every day. Symptoms are mainly the 8-speed auto transmission locks up in one gear. From startup cold drive away to after 10 minutes shifting from 6,7,8, gear down to a lower gear maybe 3rd gear not sure. Won't shift up or down in any mode.
Secondary things that happen are numerous, but don't all happen each time.
1 Advanced front lighting flashes an alert in the right side of the IP.
2 stabilitrak, rear axle alert, power steering, traction light flashes on and off.
3 Park assist off, back up camera inoperable,
4 tachometer at idle flickering to a lower rpm. (The engine does very slightly studder)
5 oil temp from normal to 0 psi fast than it could actually happen.
6 coolant temp at the IP gauge falls from normal to low again to fast of a reaction to be accurate.
7 HUD changes from one setting to (speed limit to the radio station) another setting.
8 Briefly my scan tool reads no data. After a key cycle everything pops back up.
Have not had it looked at as yet
25 years of dealership Tune-up and Drivability under my belt but 20 years ago.
11-11-2022, 06:23 PM
#2
On The Tree
Thread Starter
update,
so, i pulled the TCM harness straight up next to the radiator so I could study the connector and the male and female terminals. I used a welder tip cleaning tool to rough up the female terminal, Also I connected and disconnected the PCM 3 connectors, hit everything with electrical terminal spray and left the TCM under hood next to the radiator. Been driving it for 3 weeks 800 miles or so with no issues.
so, i pulled the TCM harness straight up next to the radiator so I could study the connector and the male and female terminals. I used a welder tip cleaning tool to rough up the female terminal, Also I connected and disconnected the PCM 3 connectors, hit everything with electrical terminal spray and left the TCM under hood next to the radiator. Been driving it for 3 weeks 800 miles or so with no issues.