148 network codes the federal record names. Is yours one?
Trouble codes
Network codes on the record
148 codes beginning with U that enough federal documents name for us to say which vehicles set them. Network — the modules talking to each other over the vehicle bus.
Every network code with a page
Source: NHTSAThe number beside each code is how many separate federal documents name it.
U0001 10U0020 8U0028 14U0029 15U0038 5U0073 20U0074 4U0075 9U0076 4U0077 10U0078 10U007D 8U0080 4U0100 78U0101 53U0102 11U0103 13U0104 20U0109 10U0111 4U0121 24U0126 13U0129 9U012D 8U0131 26U0132 6U0137 4U0140 36U0141 6U0146 13U0151 25U0155 32U0156 5U0158 4U0159 11U0164 11U0184 15U0186 5U0198 19U0199 8U019B 4U019F 9U0212 5U0238 8U023A 17U0252 4U0265 4U026A 12U026B 8U0284 28U0293 15U029D 8U02A2 4U0300 10U0323 5U0401 28U0402 45U0404 6U0412 8U0415 42U0416 8U0418 17U0420 11U0422 11U0423 8U0428 7U042E 5U0442 4U0463 4U0485 14U04A1 24U04A5 24U04A9 24U053C 6U0565 6U060F 5U0645 5U1000 6U1010 9U1011 9U1013 4U1028 7U110E 19U1110 6U1116 4U1118 4U1121 12U11C3 4U11E3 5U11E9 42U1345 6U1346 5U1412 6U1424 26U1428 9U1440 6U145D 10U1504 5U1518 6U1548 5U1549 5U154A 5U1601 5U1611 9U1624 8U18A2 5U1962 9U1A00 5U1A01 4U1A4B 7U200D 4U200E 4U200F 4U2013 6U2016 4U2018 6U2050 13U209E 6U2100 26U2101 10U211B 20U2145 5U2402 6U2603 8U2604 6U2605 6U2606 6U2624 5U2701 10U3000 196U3003 23U3008 4U3009 4U3012 19U3033 13U3035 4U3036 4U3577 5U3578 6U3579 5U357A 5U357B 5U357C 5U357D 5U357E 5U357F 5U3580 5U3636 4
About network codes
Source: NHTSA files and the OBD-II standardWhat does the U in a code like U0001 mean?
It names the system the fault was logged in: Network — the modules talking to each other over the vehicle bus. Every code on this page begins with U for that reason.
Why is a code here and not on another site's list?
Because this is not a dictionary. A code appears here when enough separate federal documents name it — manufacturer service bulletins and owner complaints — that we can say which vehicles it is a known pattern on. Codes nobody has filed anything about are not listed.