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.
- U0620Generic · NetworkLost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 2
- U0621Generic · NetworkLost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 1
- U0622Generic · NetworkLost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 2
- U0623Generic · NetworkLost Communication With Coolant Pump “A”
- U0624Generic · NetworkLost Communication With Coolant Pump “B”
- U0625Generic · NetworkLost Communication With Fuel Rail Pressure Sensor Bank 1
- U0626Generic · NetworkLost Communication With A/C Refrigerant Pressure Sensor “A”
- U0627Generic · NetworkLost Communication With A/C Refrigerant Temperature Sensor “A”
- U0628Generic · NetworkLost Communication With A/C Refrigerant Pressure Sensor “B”
- U0629Generic · NetworkLost Communication With A/C Refrigerant Temperature Sensor “B”
- U062AGeneric · NetworkLost Communication With A/C Refrigerant Distribution Valve Actuator “A”
- U062BGeneric · NetworkLost Communication With A/C Refrigerant Distribution Valve Actuator “B”
- U062CGeneric · NetworkLost Communication With A/C Refrigerant Distribution Valve Actuator “C”
- U062DGeneric · NetworkLost Communication With A/C Refrigerant Distribution Valve Actuator “D”
- U062EGeneric · NetworkLost Communication With A/C Refrigerant Expansion Valve Actuator
- U062FGeneric · NetworkLost Communication With Coolant Pump C
- U0630Generic · NetworkLost Communication With Engine Coolant Temperature Sensor 4
- U0631Generic · NetworkLost Communication With Engine Coolant Temperature Sensor 5
- U0632Generic · NetworkLost Communication With Fan 1
- U0633Generic · NetworkLost Communication With Fan 2
- U0634Generic · NetworkLost Communication With Hybrid/EV Battery Pack Coolant Temperature Sensor A
- U0635Generic · NetworkLost Communication With Hybrid/EV Battery Pack Coolant Temperature Sensor B
- U0636Generic · NetworkLost Communication With Hybrid/EV Battery Pack Coolant Control Valve A
- U0637Generic · NetworkLost Communication With Hybrid/EV Battery Pack Coolant Control Valve B
- U0638Generic · NetworkLost Communication With Hybrid/EV Electronics Coolant Temperature Sensor A
- U0639Generic · NetworkLost Communication With Hybrid/EV Electronics Coolant Temperature Sensor B
- U063AGeneric · NetworkLost Communication With Hybrid/EV Electronics Coolant Temperature Sensor C
- U063BGeneric · NetworkLost Communication With Coolant Bypass Valve Actuator A
- U063CGeneric · NetworkLost Communication With Coolant Bypass Valve Actuator B
- U063DGeneric · NetworkLost Communication With Hybrid/EV Electronics Coolant Pump A