Network fault codes
1534 Network OBD-II fault codes: what each one means, and how to track it down.
How to read a code
- P
- SystemPowertrain
- 0
- Defined bySAE, the same on every car
- 4
- AreaAuxiliary emission controls
- 20
- FaultThe specific fault in that area
Read the code
Note every stored and pending code your scanner shows, such as P0420.
Find it
Search by code or by words. For a manufacturer code (P1, B1, C1, U1) pick your make: its meaning differs by make.
Open the code
Its page explains the symptoms, likely causes, the checks to run and the fixes.
- U0101Generic · NetworkLost Communication With TCM
- U0102Generic · NetworkLost Communication With Transfer Case Control Module
- U0103Generic · NetworkLost Communication With Gear Shift Control Module A
- U0104Generic · NetworkLost Communication With Cruise Control Module
- U0105Generic · NetworkLost Communication With Fuel Injector Control Module
- U0106Generic · NetworkLost Communication With Glow Plug Control Module 1
- U0107Generic · NetworkLost Communication With Throttle Actuator A Control Module
- U0107Audi · NetworkA dead battery, A faulty TAC module, A problem with TAC module circuit, A problem with the CAN bus
- U0108Generic · NetworkLost Communication With Alternative Fuel Control Module
- U0109Generic · NetworkLost Communication With Fuel Pump Control Module A
- U010AGeneric · NetworkLost Communication With Exhaust Gas Recirculation Control Module A
- U010BGeneric · NetworkLost Communication With Exhaust Gas Recirculation Control Module B
- U010CGeneric · NetworkLost Communication With Turbocharger/Supercharger Control Module A
- U010DGeneric · NetworkLost Communication With Turbocharger/Supercharger Control Module B
- U010EGeneric · NetworkLost Communication With Reductant Control Module
- U010FGeneric · NetworkLost Communication With Air Conditioning Control Module
- U0110Generic · NetworkLost Communication With Drive Motor Control Module A
- U0111Generic · NetworkLost Communication With Battery Energy Control Module A
- U0112Generic · NetworkLost Communication With Battery Energy Control Module B
- U0113Generic · NetworkLost Communication With Emissions Critical Control Information
- U0114Generic · NetworkLost Communication With Four-Wheel Drive Clutch Control Module
- U0115Generic · NetworkLost Communication With ECM/PCM B
- U0116Generic · NetworkLost Communication With Coolant Temperature Control Module
- U0117Generic · NetworkLost Communication With PTO Control Module
- U0118Generic · NetworkLost Communication With Fuel Additive Control Module
- U0119Generic · NetworkLost Communication With Fuel Cell Control Module
- U011AGeneric · NetworkLost Communication With Exhaust Gas Sensor Module A
- U011BGeneric · NetworkLost Communication With Rocker Arm Control Module A
- U011CGeneric · NetworkLost Communication With Rocker Arm Control Module B
- U011DGeneric · NetworkLost Communication With All Wheel Drive Control Module