OBD-II Diagnostic Trouble Code
P1634
TCM Internal - Internal Watchdog Performance
P
Powertrain
engine / trans
engine / trans
1
Mfr
manufacturer code
manufacturer code
6
Computer & output circuits
34
TCM Internal - Internal Watchdog Performance
Severity · general guide
Moderate
Fix soon — usually won't strand you
Code type
Chrysler
System
Powertrain
Model
300C
Years
2005-2010