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Honda/Acura DTC Code Definitions
| P1009 | Camshaft position (CMP), timing over advanced/system performance, VTEC system malfunction | ||
| P1077 | Intake manifold air control system | low RPM malfunction | |
| P1078 | Intake manifold air control system | high RPM malfunction | |
| P1102 | Mass air flow (MAF) sensor | signal higher than expected | |
| P1103 | Mass air flow (MAF) sensor | signal higher than expected | |
| P1105 | AT | gear shift malfunction | |
| P1106 | Barometric pressure (MAP/BARO) sensor | ||
| P1107 | Barometric pressure (BARO) sensor | circuit/voltage low | |
| P1108 | Barometric pressure (BARO) sensor | circuit/voltage high | |
| P1109 | Barometric pressure (BARO)sensor | range/performance problem | |
| P1111 | Intake air temperature (IAT) sensor | circuit/intermittent voltage high | |
| P1112 | Intake air temperature (IAT) sensor | circuit/intermittent voltage low | |
| P1114 | Engine coolant temperature (ECT) sensor | circuit/intermittent voltage low | |
| P1115 | Engine coolant temperature (ECT) sensor | circuit/intermittent voltage high | |
| P1120 | Throttle motor position sensor 1 | circuit malfunction | |
| P1121 | Throttle position (TPS) sensor | position lower than expected | |
| P1122 | Throttle position (TPS)sensor | position higher than expected | |
| P1125 | Throttle position (TPS) motor | fail safe mode | |
| P1128 | Manifold absolute pressure (MAP) sensor | pressure lower than expected | |
| P1129 | Manifold absolute pressure (MAP) sensor | pressure higher than expected | |
| P1130 | Heated oxygen sensor (HO2S) 2/3 | faulty components | |
| P1133 | Heated oxygen sensor (HO2S) | RH front | insufficient switching |
| P1134 | Heated oxygen sensor (HO2S) | RH front | slow operation |
| P1153 | Heated oxygen sensor (HO2S) | LH front | insufficient switching |
| P1154 | Heated oxygen sensor (HO2S) | LH front | slow operation |
| P1157 | Air fuel (A/F) ratio sensor | circuit malfunction | |
| P1158 | AT | lock up clutch not engaging | |
| P1162 | Air fuel (A/F) sensor, circuit malfunction | ||
| P1163 | Air fuel (A/F) sensor, slow response | ||
| P1164 | Air fuel (A/F) sensor | range performance problem | |
| P1165 | Heated oxygen sensor (HO2S) | front | range/performance problem |
| P1166 | Air fuel (A/F) sensor | heater circuit malfunction | |
| P1167 | Heated oxygen sensor (HO2S) | front | heater circuit malfunction |
| P1168 | Heated oxygen sensor (HO2S) | front | voltage low |
| P1169 | Heated oxygen sensor (HO2S) | front | voltage high |
| P1171 | Fuel system | mixture lean under acceleration | |
| P1182 | Fuel temperature sensor | low input | |
| P1183 | Fuel temperature sensor | high input | |
| P1187 | Fuel tank temperature sensor | low input | |
| P1188 | Fuel tank temperature sensor | high input | |
| P1192 | AT | lock up clutch not engaging | |
| P1193 | Fuel tank pressure sensor | high input | |
| P1201 | Cylinder No.1 | misfire | |
| P1202 | Cylinder No.2 | misfire | |
| P1203 | Cylinder No.3 | misfire | |
| P1204 | Cylinder No.4 | misfire | |
| P1205 | Cylinder No.5 | misfire | |
| P1206 | Cylinder No.6 | misfire | |
| P1220 | Throttle motor position sensor 2 | circuit malfunction | |
| P1221 | Throttle motor position sensor 1/2 | signal variation | |
| P1241 | Throttle actuator control (TAC) motor | circuit 1 | malfunction |
| P1242 | Throttle actuator control (TAC) motor | circuit 2 | malfunction |
| P1243 | Throttle position (TPS) | insufficient | |
| P1244 | Closed throttle position (CTP) | insufficient | |
| P1246 | Accelerator pedal position (APP) sensor 1 | circuit malfunction | |
| P1247 | Accelerator pedal position (APP) sensor 2 | circuit malfunction | |
| P1248 | Accelerator pedal position (APP) sensor 1 and2 | incorrect signals | |
| P1253 | VTEC system malfunction | ||
| P1257 | VTEC system malfunction | ||
| P1258 | VTEC system malfunction | ||
| P1259 | VTEC system malfunction | ||
| P1271 | Accelerator pedal position (APP) sensor 1/2 | signal variation | |
| P1272 | Accelerator pedal position (APP) sensor 2/3 | signal variation | |
| P1273 | Accelerator pedal position (APP) sensor 1/3 | signal variation | |
| P1275 | Accelerator pedal position (APP) sensor 1 | circuit malfunction | |
| P1279 | VTEC control system malfunction | front bank | |
| P1280 | Accelerator pedal position (APP) sensor 2 | circuit malfunction | |
| P1285 | Accelerator pedal position (APP) sensor 3 | circuit malfunction | |
| P1290 | Throttle position (TPS) motor | forced idle mode | |
| P1295 | Throttle position (TPS) motor | power management mode | |
| P1297 | Electrical load sensor | circuit/voltage low | |
| P1298 | Electrical load sensor | circuit/voltage high | |
| P1299 | Throttle position (TPS) motor | forced engine shut down mode | |
| P1300 | Random misfire | ||
| P1301 | Cylinder No.1 | misfire | |
| P1302 | Cylinder No.2 | misfire | |
| P1303 | Cylinder No.3 | misfire | |
| P1304 | Cylinder No.4 | misfire | |
| P1305 | Cylinder No.5 | misfire | |
| P1306 | Cylinder No.6 | misfire | |
| P1310 | Ignition control module (1CM) | diagnosis | |
| P1311 | Ignition control module (1CM) | ignition coil secondary coil signal, circuit 1 | |
| P1312 | Ignition control module (1CM) | ignition coil secondary coil signal, circuit 2 | |
| P1316 | Spark plug voltage detection | front bank | circuit malfunction |
| P1317 | Spark plug voltage detection | rear bank | circuit malfunction |
| P1318 | Spark plug voltage detection module reset | ||
| P1319 | Spark plug voltage detection module reset | ||
| P1324 | Knock sensor (KS) | circuit/voltagelow | |
| P1326 | Ignition control module (1CM) | combustion quality input signal | |
| P1331 | Crankshaft position (CKP) sensor 2 | no signal | |
| P1336 | Crankshaft position (CKP) sensor 2 | intermittent signal | |
| P1337 | Crankshaft position (CKP) sensor 2 | no signal | |
| P1340 | Ignition control module (1CM) | cylinder identification synchronization | |
| P1359 | Crankshaft position (CKP) sensor | connector disconnection | |
| P1361 | Crankshaft position (CKP) sensor 1 | intermittent signal | |
| P1362 | Crankshaft position (CKP) sensor I | no signal | |
| P1366 | Crankshaft position (CKP) sensor 2 | intermittent signal | |
| P1367 | Crankshaft position (CKP) sensOr 2 | no signal | |
| P1380 | Engine control module ([CM)/ABS control module, rough road signal | communication fault | |
| P1381 | Camshaft position (CMP) sensor | intermittent signal | |
| P1382 | Camshaft position (CMP) sensor | no signal | |
| P1386 | Camshaft position (CMP) sensor 2 | intermittent signal | |
| P1387 | Camshaft position (CMP) sensor 2 | no signal | |
| P1390 | C sensor | intermittent voltage low | |
| P1391 | C sensor | performance problem | |
| P1392 | C sensor | voltage low | |
| P1393 | C sensor | voltage high | |
| P1394 | C sensor | intermittent voltage high | |
| P1399 | Random misfire | ||
| P1404 | Exhaust gas re circulation ([OR) valve | valve closed | |
| P1406 | Exhaust gas re circulation (EGR) valve position sensor | circuit problem | |
| P1410 | Secondary air injection (AIR) pump | malfunction | |
| P1415 | AIR pump electrical current sensor | open/short circuit | |
| P1416 | AIR pump electrical current sensor | circuit high | |
| P1419 | Secondary air injection (AIR) system | malfunction | |
| P1420 | NOx adsorptive catalyst system | efficiency below limit | |
| P1441 | Evaporative emission (EVAP) canister purge system | leak detected | |
| P1442 | Evaporative emission (EVAP) canister purge system | vacuum switch malfunction | |
| P1450 | Evaporative emission (EVAP) two way valve, bypass valve | voltage low | |
| P1451 | Evaporative emission (EVAP) two way valve, bypass valve | voltage high | |
| P1454 | Fuel tank pressure sensor | range/performance problem | |
| P1456 | Evaporative emission (EVAP) canister purge system (fuel tank system) | leak detected | |
| P1457 | Evaporative emission (EVAP) canister purge system (canister system) | leak detected | |
| P1459 | Evaporative emission (EVAP) canister purge system | switch malfunction | |
| P1460 | Fuel gauge tank sensor | supply circuit | |
| P1486 | Thermostat | range/performance problem | |
| P1491 | Exhaust gas re circulation (EGR) system | valve lift insufficient | |
| P1498 | Exhaust gas re circulation (EGR) valve position sensor | voltage high | |
| P1505 | Positive crankcase ventilation(PCV) | air leak | |
| P1508 | Idle air control (IAC) valve | circuit failure | |
| P1509 | Idle air control (IAC) system | high RPM | |
| P1514 | Throttle position (TPS) sensor/mass air flow(MAF) sensor | signal variation | |
| P1515 | Throttle command/actual throttle position | signal variation | |
| P1516 | Throttle position motor | position performance | |
| P1519 | Idle control system | malfunction | |
| P1523 | Throttle position motor | closed position performance | |
| P1571 | Brake pedal position (BPP) switch | no operation | |
| P1607 | Engine control module (ECM) | internal circuit failure | |
| P1608 | Engine control module (ECM) | internal circuit failure | |
| P1625 | Engine control module (ECM) | unexpected reset | |
| P1630 | Transmission control module | ||
| P1635 | Sensor supply voltage | circuit 1 malfunction | |
| P1639 | Sensor supply voltage | circuit 2 malfunction | |
| P1640 | Engine control module (ECM) | internal fault | |
| P1646 | Sensor supply voltage | circuit C malfunction | |
| P1650 | Engine control module quad driver/output driver | ||
| P1655 | AT | signal failure | |
| P1656 | Electronic stability program (ESP)control module | communication malfunction | |
| P1660 | AT to ECM | signal failure | |
| P1671 | AT to ECM signal | no signal | |
| P1672 | AT to ECM signal | signal failure | |
| P1676 | ABS/TCS control module | communication malfunction | |
| P1677 | ECM to traction control system signal | signal failure | |
| P1678 | ABS/TCS control module | communication malfunction | |
| P1681 | AT to ECM | signal A | voltage low |
| P1682 | AT to ECM | signal A | voltage high |
| P1683 | Throttle motor | default position spring performance problem | |
| P1684 | Throttle motor | return spring performance problem | |
| P1686 | AT to ECM | signal B | voltage low |
| P1687 | AT to ECM | signal B | voltage high |
| P1690 | Traction control system | circuit failure | |
| P1696 | Traction control system | voltage low | |
| P1697 | Traction control system | voltage high | |
| P1705 | AT | gear shift malfunction | |
| P1706 | AT | gear shift malfunction | |
| P1709 | AT | gear selection malfunction | |
| P1710 | AT | 1st gear hold switch | |
| P1717 | AT | gear selection malfunction | |
| P1730 | AT | gear shift malfunction | |
| P1731 | AT | gear shift malfunction | |
| P1732 | AT | gear shift malfunction | |
| P1733 | AT | gear shift malfunction | |
| P1734 | AT | gear shift malfunction | |
| P1735 | AT | gear shift malfunction | |
| P1736 | AT | gear shift malfunction | |
| P1738 | Automatic transmission | ||
| P1739 | AT | 3rd clutch pressure switch | |
| P1740 | AT | 4th clutch pressure switch | |
| P1750 | AT | hydraulic system mechanical malfunction | |
| P1751 | AT | hydraulic system mechanical malfunction | |
| P1753 | AT | lock up clutch not engaging disengaging | |
| P1758 | AT | lock up clutch not engaging | |
| P1768 | Shift solenoid (SS) A | ||
| P1773 | Shift solenoid (SS) B | ||
| P1778 | Shift solenoid (SS) C | ||
| P1786 | AT | poor gear shift | |
| P1787 | AT | lock up clutch malfunction | |
| P1788 | AT | poor gear shift | |
| P1790 | AT | lock up clutch not engaging | |
| P1791 | AT | lock up clutch not engaging | |
| P1792 | AT | lock up clutch not engaging | |
| P1793 | Automatic transmission | ||
| P1794 | Automatic transmission | BARO signal | |
| P1795 | Automatic transmission | ||
| P1835 | AT | kick down switch always ON | |
| P1850 | AT | brake band solenoid | |
| P1860 | AT | torque converter clutch (TCC) solenoid | |
| P1870 | CVT | poor acceleration | |
| P1873 | CVT | poor acceleration | |
| P1876 | CVT | poor acceleration | |
| P1877 | CVT | poor acceleration | |
| P1878 | CVT | poor acceleration | |
| P1879 | CVT | poor acceleration | |
| P1880 | CVT | poor acceleration | |
| P1881 | CVT | poor acceleration | |
| P1882 | Constantly variable transmission (CVT) | ||
| P1885 | CVT | poor acceleration | |
| P1886 | CVT | poor acceleration | |
| P1888 | CVT | poor acceleration | |
| P1889 | CVT | poor acceleration | |
| P1890 | CVT | poor acceleration | |
| P1891 | CVT | poor acceleration | |
| P1892 | CVT | poor acceleration | |
| P1893 | CVT | poor acceleration | |
| P1894 | CVT | poor acceleration | |
| P1895 | CVT | poor acceleration | |
| P1896 | CVT | poor acceleration | |
| P1897 | CVT | poor acceleration | |
| P1898 | CVT | poor acceleration | |
| P1899 | CVT | poor acceleration |