Here is the information you need to read error codes on 92-95 Civic and Del Sol (CRX). Those cars are OBD-I, so the same info should be usable for any other OBD-I Honda. I have not had interest in other Honda cars, so I don't know what year Accords and Preludes are OBD-I.

Anyway, off to instructions.

There is a 2-pin (most likely green in color) connector by the ECU or somewhere under the passenger's side dash. It's a Data Link Connector. Connect it's two pins with a piece of wire. Watch out not to get jolted while you're connecting the pins.

You will read error codes on the gauge cluster, on the Malfunction Indicator Lamp. Turn the key to position "II" and watch the lamp blink. Error codes are reported by a number of blinks.

There are short and long blinks. Long blinks mean 10, and short blinks mean 1. For example, if you get "long-long-short-short-short", it means error code 23. There is a short pause between each flash (long or short) and a long pause between 2 error codes. There will always be long flashes before short flashes. So you cannot expect number 23 to be reported as "short-long-short-long-short".

Take note of all error codes reported by ECM (Electronic Control Module). Find a list online that explains "OBD-I error codes honda" and you will find out what your problems are.

Do not forget to remove the wire from the 2-pin connector once you are done.

Thanks to civic_racer_94 for supplying the following information:

Here are the trouble codes:

0 Bad ECM (If CEL is on and no code or CEL stays on)
1 O2A - Oxygen sensor #1
2 O2B - Oxygen sensor #2
3 MAP - Manifold absolute pressure sensor
4 CKP - Crankshaft position sensor
5 MAP - Manifold absolute pressure sensor
6 ECT - Engine Coolant Temperature Sensor
7 TPS - Throttle position sensor
8 TDC - Top dead center sensor
9 CYP - Cylinder position sensor
10 IAT - Intake air temperature sensor
12 EGR - Exhaust gas recirculation lift valve
13 BARO - Atmospheric pressure sensor
14 IACV - Idle air control valve
15 Ignition output signal
16 Fuel injectors
17 VSS - speed sensor
19 Automatic transmission lockup control valve
20 Electrical load detector
21 VTEC spool solenoid valve
22 VTEC pressure valve
23 Knock sensor
30 Automatic transmission A signal
31 Automatic transmission B signal
36 Traction control found on JDM ecu's
41 Primary oxygen sensor heater
43 Fuel supply system or heated oxygen sensor circuit
45 Fuel system too rich or lean
48 LAF - lean air fuel sensor
54 CKF - crank fluctuation sensor
58 TDC sensor #2
61 Primary oxygen sensor
63 Secondary oxygen sensor
65 Secondary oxygen sensor heater
71 Random misfire cylinder 1
72 Random misfire cylinder 2
73 Random misfire cylinder 3
74 Random misfire cylinder 4
80 Exhaust Gas Recirculation insufficient flow detected
86 ECT Sensor (Engine Coolant Temperature) circuit range / performance problem
90 Evaporative Emission Control System leak detected in the fuel tank area
91 Fuel Tank Pressure Sensor low input
92 Evaporative Emission Control System insufficient purge flow

Have a 1991 honda accord the idiling is very high all the time what could it be

lisajose, I would:

. Adjust throttle cable--back off stop nut (12 mm) counter-clockwise and turn the other locking nut (12 mm) clockwise.

. Clean the Idle Air Control Valve (IACV), upper and lower ports, throttle plate, and throttle body:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-7.html#post1054149

. Clean air box, wipe out air box with a damp cloth, allow to dry, and replace air filter.

I have a 94 honda civic, after driving when I turn the car off it smells like gas. I bought a code reader and code 92 comes up, Evaporative Emission Control System insufficient purge flow. Having trouble figuring it out

. Check the condition of the hoses going to the EVAP Control Canister.

. Check the EVAP Purge Control Diaphragm Valve on top of the EVAP Control Canister.

. Check the EVAP Two-Way Valve between the fuel tank and the EVAP Control Canister.

Hello, on my '95 EG3 civic, the "SRS" indication is always on. This means that the airbags aren't working? What is the reason for this malfunction and how can I solve it?

B.r,
Lori

I have no vacuum down at the egr valve; I have tried switching selonoids,but still no vacuum?

95 civic ecu code is reading 4 short 3 long what does that mean.