Does the check engine light bother you, and you’re just curious about reading the Honda OBD1 codes?
If you like getting things done by yourself, then you’re in the right place. In this article, I will tell you how to read and erase trouble codes in your Honda model.
Towards the post’s end, you will be capable of initiating a self-diagnostic test using only a paper clip. You will learn to interpret check engine light flashes to identify the faulty component or sensor and erase the trouble codes after fixing the defective part.
The post also offers the Full list of Honda OBD1 and OBD2 codes for FREE download.
Stick to the blog’s end to find out more!
Honda OBD2 Codes List and Meaning [FULL]
Free Download: Honda Manufactured-specific OBD2 Codes List and Meaning PDF
Search your code below
| Codes | Definition |
|---|---|
| P1009 | Camshaft position (CMP), intake/letufront, bank 1 – circuit malfunction/timing over-advanced/ system performance |
| P1020 | Valve position control circuit – valve stuck off |
| P1021 | Valve position control circuit – valve stuck on |
| P1024 | Valve position control circuit – valve sticking on |
| P1025 | Valve position control circuit -valve sticking off |
| P1026 | Valve position control circuit – valve stuck on |
| P1077 | Intake manifold air control valve – stuck in high RPM position |
| P1078 | Intake manifold air control valve – stuck in low RPM position |
| P1103 | Mass Airflow Sensor Higher Than Expected |
| P1106 | Barometric pressure (BARO) sensor- range/performance problem |
| P1107 | Barometric pressure (BARO) sensor- circuit/voltage low |
| P1108 | Barometric pressure (BARO) sensor- circuit/voltage high |
| P1109 | Barometric pressure (BARO) sensor – circuit malfunction, out of range |
| 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 high |
| P1115 | Engine coolant temperature (ECT) sensor - circuit/ intermittent voltage high |
| P1116 | Engine coolant temperature (ECT) sensor – range/performance problem |
| P1120 | Throttle motor position sensor 1 - circuit malfunction |
| P1121 | Throttle position (TP) sensor – position lower than expected |
| P1122 | Throttle position (TP) sensor – position higher than expected |
| P1125 | Throttle position (TP) motor - fail safe mode |
| P1128 | MAP sensor – signal lower than expected |
| P1129 | MAP sensor – signal higher than expected |
| P1130 | Heated oxygen sensor (H02S) 2/3 – faulty components |
| P1133 | Heated oxygen sensor (HO2S) - RH front - insufficient switching |
| P1134 | Heated oxygen sensor (HO2S) - RH front - slow operation |
| P1149 | Heated oxygen sensor (H02S) – front – range/performance problem |
| P1153 | Heated oxygen sensor (HO2S) - LH front - insufficient switching |
| P1154 | Heated oxygen sensor (HO2S) - LH front - slow operation |
| P1157 | Heated oxygen sensor (H02S) – H02S 1 – circuit malfunction |
| P1158 | Heated oxygen sensor (H02S) – front- circuit low voltage negative terminal |
| P1159 | Heated oxygen sensor (H02S) – front – circuit low voltage positive terminal |
| P1162 | Heated oxygen sensor (H02S) – front – circuit malfunction |
| P1163 | Heated oxygen sensor (H02S)- front- range/performanceproblem |
| P1164 | Heated oxygen sensor (H02S) – front – circuit/slow response |
| P1165 | Heated oxygen sensor (H02S) – front – range/performanceproblem |
| P1166 | Heated oxygen sensor (H02S)- front- heater circuit malfunction |
| P1167 | Heated oxygen sensor (H02S)- front- heater circuit malfunction |
| P1168 | Heated oxygen sensor (H02S) -front -low voltage |
| P1169 | Heated oxygen sensor (H02S) -front – high voltage |
| P1171 | Heated oxygen sensor (H02S) 1 – circuit malfunction |
| P1172 | Heated oxygen sensor (H02S) 1, bank 1 – out of range, high |
| P1174 | Heated oxygen sensor (H02S) 2, bank 2 – out of range, high |
| 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 | Fuel tank pressure sensor- low input |
| P1193 | Fuel tank pressure sensor – high input |
| P1201 | Fuel System Failure Caused No. 1 Cylinder Misfire |
| P1202 | Fuel System Failure Caused No. 2 Cylinder Misfire |
| P1203 | Fuel System Failure Caused No. 3 Cylinder Misfire |
| P1204 | Fuel System Failure Caused No. 4 Cylinder Misfire |
| P1205 | Fuel System Failure Caused No. 5 Cylinder Misfire |
| P1206 | Fuel System Failure Caused No. 6 Cylinder Misfire |
| P1220 | Throttle motor position sensor 2 - circuit malfunction |
| P1221 | Throttle motor position sensor 1/2 - signal variation |
| P1241 | Throttle Valve Control Motor Circuit 1 Malfunction |
| P1242 | Throttle Valve Control Motor Circuit 2 Malfunction |
| P1243 | Throttle Position Insufficient |
| P1244 | Closed Throttle Position Insufficient |
| P1246 | Accelerator Pedal Position Sensor 1 Circuit Malfunction |
| P1247 | Accelerator Pedal Position Sensor 2 Circuit Malfunction |
| P1248 | Accelerator Pedal Position Sensor 1 and 2 Incorrect correlation |
| 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 System Malfunction Front Bank 2 |
| P1280 | Accelerator pedal position (APP) sensor 2 - circuit malfunction |
| P1285 | Accelerator pedal position (APP) sensor 3 - circuit malfunction |
| P1286 | Oil pressure sensor, rocker arm – signal stuck low |
| P1287 | Oil pressure switch, rocker arm – circuit high voltage |
| P1288 | Oil pressure switch, rocker arm -circuit low voltage |
| P1289 | Oil pressure sensor, rocker arm -stuck high |
| P128A | Valve position control circuit – valve stuck off |
| P128B | Valve position control circuit – malfunction |
| P1290 | Throttle position (TP) motor - forced idle mode |
| P1295 | Throttle position (TP) motor - power management mode |
| P1297 | Electrical load detector – circuit low voltage |
| P1298 | Electrical load detector – circuit high voltage |
| P1299 | Throttle position (TP) motor - forced engine shut down mode |
| P1300 | Random misfire |
| P1301 | Cylinder Number 1 Random Misfire Detected |
| P1302 | Cylinder Number 2 Random Misfire Detected |
| P1303 | Cylinder Number 3 Random Misfire Detected |
| P1304 | Cylinder Number 4 Random Misfire Detected |
| P1305 | Cylinder Number 5 Random Misfire Detected |
| P1306 | Cylinder Number 6 Random Misfire Detected |
| P1310 | Ignition control module (ICM) - diagnosis |
| P1311 | Ignition control module (ICM) - ignition coil secondary coil signal, circuit 1 |
| P1312 | Ignition control module (ICM) - ignition coil secondary coil signal, circuit 2 |
| P1324 | Knock sensor (KS) – circuiVvoltage low |
| P1326 | Ignition control module (ICM) - combustion quality input signal |
| P1336 | CSF Sensor Intermittent Interruption |
| P1337 | CSF Sensor No Signal |
| P1340 | Ignition control module (ICM) - cylinder identification/synchronization |
| P1355 | Intake side ignition coil – power supply circuit malfunction |
| P1356 | Exhaust side ignition coil – power supply circuit malfunction |
| P1359 | Camshaft position (CMP) sensor – top dead center sensor 1 – connector disconnection |
| P1361 | Camshaft position (CMP) sensor- intermittent signal |
| P1362 | Camshaft position (CMP) sensor – no signal |
| P1366 | Camshaft position (CMP) sensor B/TDC sensor 2 – intermittent signal |
| P1367 | Camshaft position (CMP) sensor 8/TDC sensor 2 – no signal |
| P1380 | Engine control module (ECM)/ABS control module, rough road signal - communication fault |
| P1381 | Camshaft position (CMP) sensor- intermittent signal |
| P1382 | Camshaft position (CMP) sensor- no signal |
| P1386 | Cylinder Position Sensor 2 Intermittent Interruption |
| P1387 | Cylinder Position Sensor Intermittant Inturruption |
| P1390 | G-sensor - intermittent voltage low |
| P1391 | G-sensor - performance |
| P1392 | G-sensor - voltage low |
| P1393 | G-sensor - voltage high |
| P1394 | G-sensor - intermittent voltage high |
| P1399 | Random misfire |
| P1404 | Exhaust gas recirculation (EGR) valve - valve closed |
| P1406 | Exhaust gas recirculation (EGR) valve position sensor - circuit problem |
| P1410 | Secondary air injection (AIR) pump – malfunction |
| P1415 | AIR pump electrical current sensor – circuit low |
| P1416 | AIR pump electrical current sensor – circuit high |
| P1420 | NOx adsorptive catalyst system – efficiency below limit |
| P1429 | Motor driver module – overheating signal circuit problem |
| P1430 | Motor driver module – short circuit sensor malfunction |
| P1431 | Hybrid battery pack – overheating |
| P1432 | Battery cell – overheating |
| P1433 | Hybrid battery pack – deterioration |
| P1434 | Voltage converter module – high voltage |
| P1435 | Charge/discharge balance problem |
| P1436 | Motor power inverter module – overheating |
| P1437 | Motor power inverter module – short circuit |
| P1438 | Motor driver module – overheating |
| P1439 | Motor driver module – short circuit |
| P1440 | Motor power inverter module – output circuit malfunction |
| P1441 | Evaporative emission (EVAP) canister purge system - flow detected |
| P1442 | Evaporative emission (EVAP) canister purge system - vacuum switch malfunction |
| P1443 | High voltage contactor/bypass contactor – contactor stays activated |
| P1444 | High voltage short circuit |
| P1445 | Bypass contactor malfunction |
| P1446 | Hybrid battery pack – individual voltage input deviation |
| P1447 | Hybrid battery pack deviation |
| P1448 | Hybrid battery pack cooling – malfunction |
| P1449 | Hybrid battery pack – deterioration |
| P1454 | Fuel tank pressure sensor – circuit range/performance |
| 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 |
| P145C | Evaporative emission (EVAP) canister purge system – incorrect flow |
| P1460 | Fuel Level Sensor Power Supply Circuit |
| P1486 | Thermostat – range/performance problem |
| P1491 | Exhaust gas recirculation (EGR) system – valve lift insufficient |
| P1498 | Exhaust gas recirculation (EGR) valve position sensor – voltage high |
| P1505 | Intake system – leak detected |
| P1508 | Idle air control (lAC) valve – circuit failure |
| P1509 | IAC Valve Circuit Failure |
| P1514 | Throttle position (TP) sensor/mass air flow (MAF) sensor - signal variation |
| P1515 | Throttle command/actual throttle position - signal variation |
| P1516 | Throttle position motor - position performance |
| P1519 | Idle air control (lAC) valve – circuit failure |
| P1522 | Brake booster pressure sensor – circuit malfunction, low voltage |
| P1523 | Brake booster pressure sensor – circuit malfunction, high voltage |
| P1524 | Brake booster pressure sensor – range/ performance problem |
| P1541 | Passenger compartment heater standby signal circuit – low input |
| P1542 | Passenger compartment heater standby signal circuit – high input |
| P1549 | Generator system – high voltage |
| P1553 | Hybrid battery pack temperature sensor 1 – signal circuit low input |
| P1554 | Hybrid battery pack temperature sensor 1 – signal circuit high input |
| P1555 | Hybrid battery pack temperature sensor 2 – signal circuit low input |
| P1556 | Hybrid battery pack temperature sensor 2 – signal circuit high input |
| P1557 | Hybrid battery pack temperature sensor 3 – signal circuit lowinput |
| P1558 | Hybrid battery pack temperature sensor 3 – signal circuit highinput |
| P1559 | Motor commutation sensor A – circuit low input |
| P1560 | Motor commutation sensor A – circuit high input |
| P1561 | Motor commutation sensor B – circuit low input |
| P1562 | Motor commutation sensor B – circuit high input |
| P1563 | Motor commutation sensor C – circuit low input |
| P1564 | Motor commutation sensor C – circuit high input |
| P1565 | Motor commutation signal problem |
| P1566 | Motor commutation sensor -signal problem |
| P1567 | Cylinder position signal circuit problem |
| P1568 | Battery cell – temperature signal circuit malfunction |
| P1569 | Battery cell – temperature signal circuit malfunction |
| P1570 | Hybrid battery pack – individual voltage problem |
| P1571 | Motor commutation sensor – voltage input problem |
| P1572 | Motor driver module – temperature signal circuit high |
| P1573 | DC-DC converter – temperature signal circuit high input |
| P1574 | Hybrid battery pack – temperature signal circuit malfunction |
| P1575 | Motor power inverter module – voltage malfunction |
| P1576 | Motor driver module – voltage malfunction |
| P1577 | High voltage detection signal – circuit problem |
| P1580 | Battery current sensor – circuit malfunction |
| P1581 | Motor power inverter module – current signal circuit problem |
| P1582 | Motor current U phase signal circuit – high input |
| P1583 | Motor current V phase signal circuit – high input |
| P1584 | Brake fluid pressure sensor B – circuit low voltage |
| P1585 | Brake fluid pressure sensor B – circuit range/performance problem |
| P1586 | Brake fluid pressure sensor AlB – circuit malfunction |
| P1587 | Motor power inverter module – current signal circuit low input |
| P1588 | Motor power inverter module – current signal circuit high input |
| P1589 | Motor power inverter module – current signal problem |
| P1590 | Motor current U phase signal circuit – low input |
| P1591 | Motor current U phase signal circuit – high input |
| P1593 | Motor current V phase signal circuit – high input |
| P1594 | Motor current W phase signal circuit – low input |
| P1595 | Motor current W phase signal circuit – high input |
| P15A1 | Motor driver module – temperature signal circuit high |
| P15A2 | Motor driver module – voltage signal circuit – low input |
| P15A3 | Motor driver module – voltage signal circuit – high input |
| P15A4 | AJC compressor driver – relay stays activated |
| P15A5 | Motor current sensor – circuit malfunction |
| P15A6 | U phase motor current sensor – circuit malfunction |
| P15A7 | V phase motor current sensor – circuit malfunction |
| P15A8 | W phase motor current sensor – circuit malfunction |
| P15AA | Motor rotor – position not learned |
| P15AB | Engine mounting control module – power supply circuit – low voltage |
| P15AC | Engine mounting control module – internal circuit malfunction |
| P15AD | Engine mounting control module – internal circuit malfunction |
| P15AE | Cylinder pause signal malfunction |
| P15AF | Camshaft position (CMP) sensor- signal malfunction |
| P15AO | Motor driver module – temperature signal circuit low |
| P15B1 | Camshaft position (CMP) sensor/crankshaft position (CKP) sensor- signal correlation |
| P15B2 | Brake fluid pressure sensor A – circuit low voltage |
| P15B3 | Brake fluid pressure sensor A – circuit range/performance problem |
| P15BO | Crankshaft position (CKP) sensor – signal malfunction |
| P1600 | Integrated motor assist system malfunction |
| P1601 | Integrated motor assist – system malfunction |
| P1605 | CAN data bus |
| P1606 | Integrated motor assist controller area network malfunction |
| P1607 | Engine control module (ECM) – internal circuit failure |
| P1608 | ECM – internal integrated motor assist controller area network – communication circuit malfunction |
| P1618 | Engine control module (ECM) - internal fault |
| P1625 | Engine control module (ECM) - unexpected reset |
| P1629 | Battery current sensor – circuit malfunction |
| P1630 | Transmission control module (TCM) processor error |
| P1633 | Engine control module (ECM) circuit problem |
| P1634 | Motor power inverter module – signal circuit malfunction |
| P1635 | Battery condition monitor module – malfunction |
| P1636 | Motor power inverter module – internal circuit malfunction |
| P1637 | Motor control module (MCM) – internal circuit malfunction |
| P1638 | Motor control module (MCM) – internal circuit malfunction |
| P1639 | Motor control module (MCM) -signal circuit malfunction |
| P1640 | Motor torque signal circuit – low input |
| P1641 | Motor torque signal circuit – high input |
| P1642 | Battery signal circuit – low input |
| P1643 | Battery signal circuit – high input |
| P1644 | Motor control module (MCM) – signal malfunction |
| P1645 | Motor control module (MCM) – signal malfunction |
| P1646 | Motor control module (MCM) – signal malfunction |
| P1647 | Engine speed signal – circuit problem |
| P1648 | Motor control module (MCM) – communication signal circuit problem |
| P1650 | Engine control module quad driver/output driver |
| P1655 | AT – signal failure |
| P1656 | Electronic Stability Programme Control Module Communication Malfunction |
| P1658 | Electronic throttle system (ETS) control relay – on malfunction |
| P1659 | Electronic throttle system (ETS) control relay – off malfunction |
| P165B | Electronic throttle system (ETS) relay – malfunction |
| P1660 | AT to ECM – data line failure – V6 |
| P1673 | Motor control module (MCM) – relay stays activated |
| P1676 | ABS/TCS control module – communication malfunction |
| P1678 | ABS/TCS control module – communication malfunction |
| P1679 | RSCD Signal Circuit Malfunction |
| P1681 | AT to ECM- signal A- voltage low |
| P1682 | AT to ECM- signal A- voltage high |
| P1683 | Throttle valve – default position spring performance problem |
| P1684 | Throttle valve – return spring performance problem |
| P1685 | Engine torque signal – circuit low input |
| P1686 | Engine torque signal – circuit high input |
| P1687 | AT to ECM- signal 8- voltage high |
| P1689 | Mode signal circuit 2 |
| P1690 | Traction Control System Circuit Failure |
| P1696 | Traction Control System Voltage Low |
| P1697 | Traction Control System Voltage High |
| P16B3 | Power command signaf circuit – low input |
| P16B4 | Power command signal circuit – high input |
| P16B7 | Mode signal circuit 1 – low input |
| P16B8 | Mode signal circuit 1 – high input |
| P16BA | Battery cell – high input |
| P16BB | Generator system – low voltage |
| P16BC | Generator system – low voltage |
| P16C0 | ECM – programming error |
| P16C1 | Motor control module (MCM) – program not installed – battery condition monitor module program |
| P16C3 | DC-DC converter temperature sensor – circuit malfunction |
| P16C4 | Engine mounting control actuator – engine mounting control power supply circuit – stuck off |
| P16C5 | Engine mounting control actuator – engine mounting control power supply circuit – stuck on |
| P16C6 | Engine mounting control actuator – high voltage during function test |
| P16C7 | Rear engine mounting actuator control circuit – control circuit high current |
| P16C8 | Front engine mounting actuator control circuit – control circuit high current |
| P16C9 | Engine mounting control module – internal circuit malfunction |
| P16D5 | CAN data bus |
| P16D6 | Integrated motor assist controller area network malfunction |
| P16D7 | ECM – CAN data bus – communication circuit malfunction |
| P1705 | CVT – gear shift malfunction |
| P1706 | CVT – gear shift malfunction |
| P1709 | AT - Sport shift mode malfunction |
| P1710 | First Hold Switch Circuit Fault Stuck On |
| P1717 | AT- gear selection malfunction |
| P1730 | AT- gear shift malfunction |
| P1731 | AT- gear shift malfunction |
| P1732 | Problem In Shift Control System |
| P1733 | AT- gear shift malfunction |
| P1734 | AT – gear shift malfunction |
| P1738 | Automatic transmission |
| P1739 | Automatic transmission |
| P1740 | AT – 4th clutch pressure switch |
| P1750 | AT – hydraulic system mechanical malfunction |
| P1751 | AT – hydraulic system mechanical malfunction |
| P1753 | AT- no gear shift |
| P1758 | AT – lock-up clutch not engaging |
| P1768 | AT – lock-up clutch not engaging |
| P1773 | AT – lock-up clutch not engaging |
| P1778 | Clutch Pressure Control Solenoid Valve 'C' Circuit |
| P1786 | AT – poor gear shift – V6 |
| P1787 | Automatic Transmission Lock-Up Clutch Malfunction |
| P1788 | Automatic Transmission Poor Gear Shift |
| P1790 | AT- lock-up clutch not engaging |
| P1791 | AT – lock-up clutch not engaging- V6 |
| P1792 | AT- lock-up clutch not engaging |
| P1793 | Automatic transmission |
| P1794 | Automatic transmission – BARO signal – V6 |
| P1835 | AT - kick-down switch |
| P1850 | AT - brake band solenoid malfunction |
| P1860 | AT - torque converter clutch (TCC) solenoid circuit |
| 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) |
| P1884 | Secondary Gear Speed Sensor 2 Circuit Malfunction |
| 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 |
Honda OBD1 Codes List [FULL]
| Code | Meaning |
|---|---|
| Codes 0 and 11 | Electronic control module (ECM) |
| Code 1 | Heated oxygen sensor A |
| Code 2 | Oxygen content B |
| Codes 3 and 5 | Manifold absolute pressure |
| Code 4 | Crank position sensor |
| Code 6 | Engine coolant temperature |
| Code 7 | Throttle position sensor |
| Code 8 | Top dead center sensor |
| Code 9 | No.1 cylinder position sensor |
| Code 10 | Intake air temperature sensor |
| Code 12 | Exhaust recirculation system |
| Code 13 | Barometric pressure sensor |
| Code 14 | Idle air control valve or bad ECM |
| Code 15 | Ignition output signal |
| Code 16 | Fuel Injector |
| Code 17 | Vehicle speed sensor |
| Code 19 | A/T lock-up control solenoid |
| Code 20 | Electric load detector |
| Code 21 | V-TEC control solenoid |
| Code 22 | V-TEC pressure solenoid |
| Code 23 | Knock sensor |
| Code 30 | A/T FI signal A |
| Code 30 | A/T FI signal B |
| Code 41 | Heated oxygen sensor heater |
| Code 43 | Fuel supply system |
| Code 45 | Fuel supply metering |
| Code 48 | Heated oxygen sensor |
| Code 61 | Front heated oxygen sensor |
| Code 63 | Rear heated oxygen sensor |
| Code 65 | Rear heated oxygen sensor heater |
| Code 67 | Catalytic converter system |
| Code 70 | Automatic transaxle |
| Code 71 | Misfire detected cylinder 1 |
| Code 72 | Misfire detected cylinder 2 |
| Code 73 | Misfire detected cylinder 3 |
| Code 74 | Misfire detected cylinder 4 |
| Code 75 | Misfire detected cylinder 5 |
| Code 76 | Misfire detected cylinder 6 |
| Code 80 | Exhaust recirculation system |
| Code 86 | Coolant temperature |
| Code 92 | Evaporative emission control system |
READ MORE: Best OBD2 Scanners for Honda Acura [Review and Comparison]
Honda OBD1 Connector Location
Honda OBD1 plug is found on the passenger side beneath the glove box. The plug has a blue plastic casing and houses two connectors. One of the connectors is more extensive and has 3 double pins, whereas the other has 2 double pins. The connector to use is the 2 double pins.
How to Pull Honda OBD1 Codes Without a Scanner
Firstly, before embarking on the journey to read the OBD1 codes, you’ll need the following items: a paper, pen, and unrolled paper clip.
Here is how to go about the self-diagnostic test:
- Fold the unrolled paper clip into a U or V shape and insert its ends on the 2 double pin connector. It should form a loop between the right and left pins.
- Turn the key through 2 clicks to start the ignition without cranking the engine.
- Next, fix your eyes on the instrument cluster, taking a keen interest in the check engine light.
- Count the number of flashes to identify the error code.
You should note that long flashes represent the first digit in a two-digit code. For example, two long flashes would indicate number two as the first digit of the two-digit code. The second digit of the code is identified through short flashes.
Single-digit codes are interpreted by counting short interval flashes. For multiple trouble codes, the signal to the consecutive trouble code is a much longer pause between the two codes.
- Record the error codes using a pen and paper.
- Finally, you can look up the trouble codes in the section down below, or you can Google them up on Honda’s website.
How to Clear a Honda OBD1 Code
After fixing the faulty component or sensors, you need not be frustrated or distracted by the flashing check engine light. Here are some of the ways that you could use to eliminate the error codes:
1. Disconnecting the negative battery terminal
Disconnect the negative battery terminal for 10 to 15 seconds, then reconnect it to resets the ECU. This action eliminates the trouble codes. However, this method suffers several drawbacks, including rough driving for about 50 miles before the ECU relearn its values. Secondly, you’ll need to reconfigure your radio stations as radio codes are lost during the reset.
2. Pulling out the ACG or alternator sense fuse
This is a much safer reset method, and you won’t have to reconfigure your radio stations once it’s done. Here is how to go about it:
- Identify the fuse compartment located near the driver side kick panel.
- Uncover the fuse box and locate the number used to represent the ACG or the alternator sensor fuse. This information is indicated beneath the circuit schematic attached under the fuse box cover.
- Locate the fuse and dislodge it before reinserting it.
This will reset the ECU. You can crank up the engine and let it idle for about 10 minutes for the ECU to relearn its values, or you could take the vehicle on a short drive.
Final thoughts
The blue OBD1 plug is the first thing to look for when performing a self-diagnostic test. Pull out the error codes by looping through the right and left terminal of the 2-double pin connector housed in this plug. You can do this by counting the flashes the check engine light will illuminate after starting the car without cranking the engine.
Next, after the fix, eliminate the error codes by resetting the ECU. The reset will occur when you disconnect and reconnect the negative battery terminal. Better still, you can pull out the ACG or alternator sensor plug and reinsert it.
Read more: Generic OBD2 Codes FULL List for All Cars [PDF, Updated]
