OBD2 Diagnostic Codes
Explore our comprehensive database of 2,798+ diagnostic trouble codes with detailed explanations, symptoms, and repair guidance.
Enter a code like P0420 to see its diagnostic guide, or ask our AI about any code
Browse by Category
OBD2 codes are organized into four main categories based on the vehicle system they relate to.
B - Body
366 codesInterior electronics, body control module, HVAC, lighting, airbags, and comfort systems.
Common Examples:
B0001B0010B0055
Learn about B codes
C - Chassis
432 codesABS, traction control, stability control, suspension, steering, and brake systems.
Common Examples:
C0035C0057C1009
Learn about C codes
U - Network
500 codesCAN bus, communication protocols, module interconnections, and network integrity codes.
Common Examples:
U0100U0113U0167
Learn about U codes
Understanding OBD2 Codes
OBD2 (On-Board Diagnostics II) codes are standardized diagnostic trouble codes used to identify vehicle issues. When your check engine light comes on, your vehicle stores one or more of these codes.
Each code follows a specific format: a letter prefix (P, B, C, or U) followed by four digits. The first digit indicates whether it's a generic (0) or manufacturer-specific (1) code.
How to Use This Database
1. Find Your Code: Use the search bar above or browse by category to find your specific diagnostic code.
2. Review the Guide: Each code page includes symptoms, probable causes, and step-by-step diagnostic procedures.
3. Chat for Help: Need personalized guidance? Use our AI assistant on the home page for real-time diagnostic help.
Important: While our diagnostic guides provide comprehensive information, they are for educational purposes only. Always consult a certified mechanic for professional diagnosis and repair. Improper repairs can be dangerous.
Read Your Codes with an OBD2 Scanner
An OBD2 scanner lets you read and clear diagnostic trouble codes from your vehicle.
FIXD OBD2 Scanner
Bluetooth scanner with free app - great for beginners
$20-60
BlueDriver Pro
Professional-grade with enhanced diagnostics
$100-130
ANCEL AD310
Budget-friendly handheld scanner
$15-25
Autel MaxiCOM MK808
Full-system professional diagnostics
$300-400
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Need Help With Your Code?
Our AI assistant can help you understand your specific diagnostic code and provide personalized guidance based on your vehicle and symptoms.
Chat With AI AssistantComplete Code Directory
Browse all 2,798 diagnostic trouble codes. Click any code for its full diagnostic guide.
P0xxx — Generic Powertrain
Standardized engine, transmission, and emissions codes — 1,000 codes
P0000P0001P0002P0003P0004P0005P0006P0007P0008P0009P0010P0011P0012P0013P0014P0015P0016P0017P0018P0019P0020P0021P0022P0023P0024P0025P0026P0027P0028P0029P0030P0031P0032P0033P0034P0035P0036P0037P0038P0039P0040P0041P0042P0043P0044P0045P0046P0047P0048P0049P0050P0051P0052P0053P0054P0055P0056P0057P0058P0059P0060P0061P0062P0063P0064P0065P0066P0067P0068P0069P0070P0071P0072P0073P0074P0075P0076P0077P0078P0079P0080P0081P0082P0083P0084P0085P0086P0087P0088P0089P0090P0091P0092P0093P0094P0095P0096P0097P0098P0099P0100P0101P0102P0103P0104P0105P0106P0107P0108P0109P0110P0111P0112P0113P0114P0115P0116P0117P0118P0119P0120P0121P0122P0123P0124P0125P0126P0127P0128P0129P0130P0131P0132P0133P0134P0135P0136P0137P0138P0139P0140P0141P0142P0143P0144P0145P0146P0147P0148P0149P0150P0151P0152P0153P0154P0155P0156P0157P0158P0159P0160P0161P0162P0163P0164P0165P0166P0167P0168P0169P0170P0171P0172P0173P0174P0175P0176P0177P0178P0179P0180P0181P0182P0183P0184P0185P0186P0187P0188P0189P0190P0191P0192P0193P0194P0195P0196P0197P0198P0199P0200P0201P0202P0203P0204P0205P0206P0207P0208P0209P0210P0211P0212P0213P0214P0215P0216P0217P0218P0219P0220P0221P0222P0223P0224P0225P0226P0227P0228P0229P0230P0231P0232P0233P0234P0235P0236P0237P0238P0239P0240P0241P0242P0243P0244P0245P0246P0247P0248P0249P0250P0251P0252P0253P0254P0255P0256P0257P0258P0259P0260P0261P0262P0263P0264P0265P0266P0267P0268P0269P0270P0271P0272P0273P0274P0275P0276P0277P0278P0279P0280P0281P0282P0283P0284P0285P0286P0287P0288P0289P0290P0291P0292P0293P0294P0295P0296P0297P0298P0299P0300P0301P0302P0303P0304P0305P0306P0307P0308P0309P0310P0311P0312P0313P0314P0315P0316P0317P0318P0319P0320P0321P0322P0323P0324P0325P0326P0327P0328P0329P0330P0331P0332P0333P0334P0335P0336P0337P0338P0339P0340P0341P0342P0343P0344P0345P0346P0347P0348P0349P0350P0351P0352P0353P0354P0355P0356P0357P0358P0359P0360P0361P0362P0363P0364P0365P0366P0367P0368P0369P0370P0371P0372P0373P0374P0375P0376P0377P0378P0379P0380P0381P0382P0383P0384P0385P0386P0387P0388P0389P0390P0391P0392P0393P0394P0395P0396P0397P0398P0399P0400P0401P0402P0403P0404P0405P0406P0407P0408P0409P0410P0411P0412P0413P0414P0415P0416P0417P0418P0419P0420P0421P0422P0423P0424P0425P0426P0427P0428P0429P0430P0431P0432P0433P0434P0435P0436P0437P0438P0439P0440P0441P0442P0443P0444P0445P0446P0447P0448P0449P0450P0451P0452P0453P0454P0455P0456P0457P0458P0459P0460P0461P0462P0463P0464P0465P0466P0467P0468P0469P0470P0471P0472P0473P0474P0475P0476P0477P0478P0479P0480P0481P0482P0483P0484P0485P0486P0487P0488P0489P0490P0491P0492P0493P0494P0495P0496P0497P0498P0499P0500P0501P0502P0503P0504P0505P0506P0507P0508P0509P0510P0511P0512P0513P0514P0515P0516P0517P0518P0519P0520P0521P0522P0523P0524P0525P0526P0527P0528P0529P0530P0531P0532P0533P0534P0535P0536P0537P0538P0539P0540P0541P0542P0543P0544P0545P0546P0547P0548P0549P0550P0551P0552P0553P0554P0555P0556P0557P0558P0559P0560P0561P0562P0563P0564P0565P0566P0567P0568P0569P0570P0571P0572P0573P0574P0575P0576P0577P0578P0579P0580P0581P0582P0583P0584P0585P0586P0587P0588P0589P0590P0591P0592P0593P0594P0595P0596P0597P0598P0599P0600P0601P0602P0603P0604P0605P0606P0607P0608P0609P0610P0611P0612P0613P0614P0615P0616P0617P0618P0619P0620P0621P0622P0623P0624P0625P0626P0627P0628P0629P0630P0631P0632P0633P0634P0635P0636P0637P0638P0639P0640P0641P0642P0643P0644P0645P0646P0647P0648P0649P0650P0651P0652P0653P0654P0655P0656P0657P0658P0659P0660P0661P0662P0663P0664P0665P0666P0667P0668P0669P0670P0671P0672P0673P0674P0675P0676P0677P0678P0679P0680P0681P0682P0683P0684P0685P0686P0687P0688P0689P0690P0691P0692P0693P0694P0695P0696P0697P0698P0699P0700P0701P0702P0703P0704P0705P0706P0707P0708P0709P0710P0711P0712P0713P0714P0715P0716P0717P0718P0719P0720P0721P0722P0723P0724P0725P0726P0727P0728P0729P0730P0731P0732P0733P0734P0735P0736P0737P0738P0739P0740P0741P0742P0743P0744P0745P0746P0747P0748P0749P0750P0751P0752P0753P0754P0755P0756P0757P0758P0759P0760P0761P0762P0763P0764P0765P0766P0767P0768P0769P0770P0771P0772P0773P0774P0775P0776P0777P0778P0779P0780P0781P0782P0783P0784P0785P0786P0787P0788P0789P0790P0791P0792P0793P0794P0795P0796P0797P0798P0799P0800P0801P0802P0803P0804P0805P0806P0807P0808P0809P0810P0811P0812P0813P0814P0815P0816P0817P0818P0819P0820P0821P0822P0823P0824P0825P0826P0827P0828P0829P0830P0831P0832P0833P0834P0835P0836P0837P0838P0839P0840P0841P0842P0843P0844P0845P0846P0847P0848P0849P0850P0851P0852P0853P0854P0855P0856P0857P0858P0859P0860P0861P0862P0863P0864P0865P0866P0867P0868P0869P0870P0871P0872P0873P0874P0875P0876P0877P0878P0879P0880P0881P0882P0883P0884P0885P0886P0887P0888P0889P0890P0891P0892P0893P0894P0895P0896P0897P0898P0899P0900P0901P0902P0903P0904P0905P0906P0907P0908P0909P0910P0911P0912P0913P0914P0915P0916P0917P0918P0919P0920P0921P0922P0923P0924P0925P0926P0927P0928P0929P0930P0931P0932P0933P0934P0935P0936P0937P0938P0939P0940P0941P0942P0943P0944P0945P0946P0947P0948P0949P0950P0951P0952P0953P0954P0955P0956P0957P0958P0959P0960P0961P0962P0963P0964P0965P0966P0967P0968P0969P0970P0971P0972P0973P0974P0975P0976P0977P0978P0979P0980P0981P0982P0983P0984P0985P0986P0987P0988P0989P0990P0991P0992P0993P0994P0995P0996P0997P0998P0999
P1xxx — Manufacturer Powertrain
Manufacturer-specific powertrain codes — 500 codes
P1000P1001P1002P1003P1004P1005P1006P1007P1008P1009P1010P1011P1012P1013P1014P1015P1016P1017P1018P1019P1020P1021P1022P1023P1024P1025P1026P1027P1028P1029P1030P1031P1032P1033P1034P1035P1036P1037P1038P1039P1040P1041P1042P1043P1044P1045P1046P1047P1048P1049P1050P1051P1052P1053P1054P1055P1056P1057P1058P1059P1060P1061P1062P1063P1064P1065P1066P1067P1068P1069P1070P1071P1072P1073P1074P1075P1076P1077P1078P1079P1080P1081P1082P1083P1084P1085P1086P1087P1088P1089P1090P1091P1092P1093P1094P1095P1096P1097P1098P1099P1100P1101P1102P1103P1104P1105P1106P1107P1108P1109P1110P1111P1112P1113P1114P1115P1116P1117P1118P1119P1120P1121P1122P1123P1124P1125P1126P1127P1128P1129P1130P1131P1132P1133P1134P1135P1136P1137P1138P1139P1140P1141P1142P1143P1144P1145P1146P1147P1148P1149P1150P1151P1152P1153P1154P1155P1156P1157P1158P1159P1160P1161P1162P1163P1164P1165P1166P1167P1168P1169P1170P1171P1172P1173P1174P1175P1176P1177P1178P1179P1180P1181P1182P1183P1184P1185P1186P1187P1188P1189P1190P1191P1192P1193P1194P1195P1196P1197P1198P1199P1200P1201P1202P1203P1204P1205P1206P1207P1208P1209P1210P1211P1212P1213P1214P1215P1216P1217P1218P1219P1220P1221P1222P1223P1224P1225P1226P1227P1228P1229P1230P1231P1232P1233P1234P1235P1236P1237P1238P1239P1240P1241P1242P1243P1244P1245P1246P1247P1248P1249P1250P1251P1252P1253P1254P1255P1256P1257P1258P1259P1260P1261P1262P1263P1264P1265P1266P1267P1268P1269P1270P1271P1272P1273P1274P1275P1276P1277P1278P1279P1280P1281P1282P1283P1284P1285P1286P1287P1288P1289P1290P1291P1292P1293P1294P1295P1296P1297P1298P1299P1300P1301P1302P1303P1304P1305P1306P1307P1308P1309P1310P1311P1312P1313P1314P1315P1316P1317P1318P1319P1320P1321P1322P1323P1324P1325P1326P1327P1328P1329P1330P1331P1332P1333P1334P1335P1336P1337P1338P1339P1340P1341P1342P1343P1344P1345P1346P1347P1348P1349P1350P1351P1352P1353P1354P1355P1356P1357P1358P1359P1360P1361P1362P1363P1364P1365P1366P1367P1368P1369P1370P1371P1372P1373P1374P1375P1376P1377P1378P1379P1380P1381P1382P1383P1384P1385P1386P1387P1388P1389P1390P1391P1392P1393P1394P1395P1396P1397P1398P1399P1400P1401P1402P1403P1404P1405P1406P1407P1408P1409P1410P1411P1412P1413P1414P1415P1416P1417P1418P1419P1420P1421P1422P1423P1424P1425P1426P1427P1428P1429P1430P1431P1432P1433P1434P1435P1436P1437P1438P1439P1440P1441P1442P1443P1444P1445P1446P1447P1448P1449P1450P1451P1452P1453P1454P1455P1456P1457P1458P1459P1460P1461P1462P1463P1464P1465P1466P1467P1468P1469P1470P1471P1472P1473P1474P1475P1476P1477P1478P1479P1480P1481P1482P1483P1484P1485P1486P1487P1488P1489P1490P1491P1492P1493P1494P1495P1496P1497P1498P1499
Bxxxx — Body
Interior, HVAC, airbags, lighting, and comfort systems — 366 codes
B0000B0001B0002B0003B0004B0005B0006B0007B0008B0009B0010B0011B0012B0013B0014B0015B0016B0017B0018B0019B0020B0021B0022B0023B0024B0025B0026B0027B0028B0029B0030B0031B0032B0033B0034B0035B0036B0037B0038B0039B0040B0041B0042B0043B0044B0045B0046B0047B0048B0049B0050B0051B0052B0053B0054B0055B0056B0057B0058B0059B0060B0061B0062B0063B0064B0065B0066B0067B0068B0069B0070B0071B0072B0073B0074B0075B0076B0077B0078B0079B0080B0081B0082B0083B0084B0085B0086B0087B0088B0089B0090B0091B0092B0093B0094B0095B0096B0097B0098B0099B0100B0101B0102B0103B0104B0105B0106B0107B0108B0109B0110B0111B0112B0113B0114B0115B0116B0117B0118B0119B0120B0121B0122B0123B0124B0125B0126B0127B0128B0129B0130B0131B0132B0133B0134B0135B0136B0137B0138B0139B0140B0141B0142B0143B0144B0145B0146B0147B0148B0149B0150B0151B0152B0153B0154B0155B0156B0157B0158B0159B0160B0161B0162B0163B0164B0165B1000B1001B1002B1003B1004B1005B1006B1007B1008B1009B1010B1011B1012B1013B1014B1015B1016B1017B1018B1019B1020B1021B1022B1023B1024B1025B1026B1027B1028B1029B1030B1031B1032B1033B1034B1035B1036B1037B1038B1039B1040B1041B1042B1043B1044B1045B1046B1047B1048B1049B1050B1051B1052B1053B1054B1055B1056B1057B1058B1059B1060B1061B1062B1063B1064B1065B1066B1067B1068B1069B1070B1071B1072B1073B1074B1075B1076B1077B1078B1079B1080B1081B1082B1083B1084B1085B1086B1087B1088B1089B1090B1091B1092B1093B1094B1095B1096B1097B1098B1099B2000B2001B2002B2003B2004B2005B2006B2007B2008B2009B2010B2011B2012B2013B2014B2015B2016B2017B2018B2019B2020B2021B2022B2023B2024B2025B2026B2027B2028B2029B2030B2031B2032B2033B2034B2035B2036B2037B2038B2039B2040B2041B2042B2043B2044B2045B2046B2047B2048B2049B2050B2051B2052B2053B2054B2055B2056B2057B2058B2059B2060B2061B2062B2063B2064B2065B2066B2067B2068B2069B2070B2071B2072B2073B2074B2075B2076B2077B2078B2079B2080B2081B2082B2083B2084B2085B2086B2087B2088B2089B2090B2091B2092B2093B2094B2095B2096B2097B2098B2099
Cxxxx — Chassis
ABS, traction control, suspension, steering, and brakes — 432 codes
C0000C0001C0002C0003C0004C0005C0006C0007C0008C0009C0010C0011C0012C0013C0014C0015C0016C0017C0018C0019C0020C0021C0022C0023C0024C0025C0026C0027C0028C0029C0030C0031C0032C0033C0034C0035C0036C0037C0038C0039C0040C0041C0042C0043C0044C0045C0046C0047C0048C0049C0050C0051C0052C0053C0054C0055C0056C0057C0058C0059C0060C0061C0062C0063C0064C0065C0066C0067C0068C0069C0070C0071C0072C0073C0074C0075C0076C0077C0078C0079C0080C0081C0082C0083C0084C0085C0086C0087C0088C0089C0090C0091C0092C0093C0094C0095C0096C0097C0098C0099C0100C0101C0102C0103C0104C0105C0106C0107C0108C0109C0110C0111C0112C0113C0114C0115C0116C0117C0118C0119C0120C0121C0122C0123C0124C0125C0126C0127C0128C0129C0130C0131C0132C0133C0134C0135C0136C0137C0138C0139C0140C0141C0142C0143C0144C0145C0146C0147C0148C0149C0150C0151C0152C0153C0154C0155C0156C0157C0158C0159C0160C0161C0162C0163C0164C0165C1000C1001C1002C1003C1004C1005C1006C1007C1008C1009C1010C1011C1012C1013C1014C1015C1016C1017C1018C1019C1020C1021C1022C1023C1024C1025C1026C1027C1028C1029C1030C1031C1032C1033C1034C1035C1036C1037C1038C1039C1040C1041C1042C1043C1044C1045C1046C1047C1048C1049C1050C1051C1052C1053C1054C1055C1056C1057C1058C1059C1060C1061C1062C1063C1064C1065C1066C1067C1068C1069C1070C1071C1072C1073C1074C1075C1076C1077C1078C1079C1080C1081C1082C1083C1084C1085C1086C1087C1088C1089C1090C1091C1092C1093C1094C1095C1096C1097C1098C1099C1100C1101C1102C1103C1104C1105C1106C1107C1108C1109C1110C1111C1112C1113C1114C1115C1116C1117C1118C1119C1120C1121C1122C1123C1124C1125C1126C1127C1128C1129C1130C1131C1132C1133C1134C1135C1136C1137C1138C1139C1140C1141C1142C1143C1144C1145C1146C1147C1148C1149C1150C1151C1152C1153C1154C1155C1156C1157C1158C1159C1160C1161C1162C1163C1164C1165C2000C2001C2002C2003C2004C2005C2006C2007C2008C2009C2010C2011C2012C2013C2014C2015C2016C2017C2018C2019C2020C2021C2022C2023C2024C2025C2026C2027C2028C2029C2030C2031C2032C2033C2034C2035C2036C2037C2038C2039C2040C2041C2042C2043C2044C2045C2046C2047C2048C2049C2050C2051C2052C2053C2054C2055C2056C2057C2058C2059C2060C2061C2062C2063C2064C2065C2066C2067C2068C2069C2070C2071C2072C2073C2074C2075C2076C2077C2078C2079C2080C2081C2082C2083C2084C2085C2086C2087C2088C2089C2090C2091C2092C2093C2094C2095C2096C2097C2098C2099
Uxxxx — Network
CAN bus, module communication, and network codes — 500 codes
U0000U0001U0002U0003U0004U0005U0006U0007U0008U0009U0010U0011U0012U0013U0014U0015U0016U0017U0018U0019U0020U0021U0022U0023U0024U0025U0026U0027U0028U0029U0030U0031U0032U0033U0034U0035U0036U0037U0038U0039U0040U0041U0042U0043U0044U0045U0046U0047U0048U0049U0050U0051U0052U0053U0054U0055U0056U0057U0058U0059U0060U0061U0062U0063U0064U0065U0066U0067U0068U0069U0070U0071U0072U0073U0074U0075U0076U0077U0078U0079U0080U0081U0082U0083U0084U0085U0086U0087U0088U0089U0090U0091U0092U0093U0094U0095U0096U0097U0098U0099U0100U0101U0102U0103U0104U0105U0106U0107U0108U0109U0110U0111U0112U0113U0114U0115U0116U0117U0118U0119U0120U0121U0122U0123U0124U0125U0126U0127U0128U0129U0130U0131U0132U0133U0134U0135U0136U0137U0138U0139U0140U0141U0142U0143U0144U0145U0146U0147U0148U0149U0150U0151U0152U0153U0154U0155U0156U0157U0158U0159U0160U0161U0162U0163U0164U0165U0166U0167U0168U0169U0170U0171U0172U0173U0174U0175U0176U0177U0178U0179U0180U0181U0182U0183U0184U0185U0186U0187U0188U0189U0190U0191U0192U0193U0194U0195U0196U0197U0198U0199U0200U0201U0202U0203U0204U0205U0206U0207U0208U0209U0210U0211U0212U0213U0214U0215U0216U0217U0218U0219U0220U0221U0222U0223U0224U0225U0226U0227U0228U0229U0230U0231U0232U0233U0234U0235U0236U0237U0238U0239U0240U0241U0242U0243U0244U0245U0246U0247U0248U0249U0250U0251U0252U0253U0254U0255U0256U0257U0258U0259U0260U0261U0262U0263U0264U0265U0266U0267U0268U0269U0270U0271U0272U0273U0274U0275U0276U0277U0278U0279U0280U0281U0282U0283U0284U0285U0286U0287U0288U0289U0290U0291U0292U0293U0294U0295U0296U0297U0298U0299U0300U0301U0302U0303U0304U0305U0306U0307U0308U0309U0310U0311U0312U0313U0314U0315U0316U0317U0318U0319U0320U0321U0322U0323U0324U0325U0326U0327U0328U0329U0330U0331U0332U0333U0334U0335U0336U0337U0338U0339U0340U0341U0342U0343U0344U0345U0346U0347U0348U0349U0350U0351U0352U0353U0354U0355U0356U0357U0358U0359U0360U0361U0362U0363U0364U0365U0366U0367U0368U0369U0370U0371U0372U0373U0374U0375U0376U0377U0378U0379U0380U0381U0382U0383U0384U0385U0386U0387U0388U0389U0390U0391U0392U0393U0394U0395U0396U0397U0398U0399U0400U0401U0402U0403U0404U0405U0406U0407U0408U0409U0410U0411U0412U0413U0414U0415U0416U0417U0418U0419U0420U0421U0422U0423U0424U0425U0426U0427U0428U0429U0430U0431U0432U0433U0434U0435U0436U0437U0438U0439U0440U0441U0442U0443U0444U0445U0446U0447U0448U0449U0450U0451U0452U0453U0454U0455U0456U0457U0458U0459U0460U0461U0462U0463U0464U0465U0466U0467U0468U0469U0470U0471U0472U0473U0474U0475U0476U0477U0478U0479U0480U0481U0482U0483U0484U0485U0486U0487U0488U0489U0490U0491U0492U0493U0494U0495U0496U0497U0498U0499