OBD fault code library
Look up any P or U code to see what it means, what causes it, the parts involved and how it gets fixed.
Free on OBD DashX
Looking for real-world repair data?
OBD DashX shows which problems come with each code, how often they show up in other vehicles, and how to fix them — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
Fault codes
P0866
Traction Control Module (TCM) Communication Circuit High
Generic
Transmission System
High severity
P0871
Transmission Fluid Pressure Sensor/Switch C Circuit Range/Performance
Generic
Transmission System
High severity
P0872
Transmission Fluid Pressure Sensor/Switch C circuit Low
Generic
Transmission System
High severity
P0874
Transmission Fluid Pressure Sensor/Switch C circuit Intermittent
Generic
Transmission System
High severity
P0877
Transmission Fluid Pressure Sensor/Switch D circuit Low
Generic
Transmission System
High severity
P0878
Transmission Fluid Pressure Sensor/Switch D circuit High
Generic
Transmission System
High severity
P0881
Traction Control Module (TCM) Power Input Signal Range/Performance
Generic
Transmission System
High severity
P0883
Traction Control Module (TCM) Power Input Signal High
Generic
Transmission System
High severity
P0884
Traction Control Module (TCM) Power Input Signal Intermittent
Generic
Transmission System
High severity
P0886
Traction Control Module (TCM) Power Relay Control Circuit Low
Generic
Transmission System
High severity
Scan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.