Do you have a CEL?
Do not just reset the ECU by pulling the battery's negative cable. Sure, that will reset the light, but you are not finding out what is wrong with your car. The light will always come back, until you fix it.
This is how you check your own CEL (Check Engine Light), at home, without driving to a mechanic, auto store, dealer. Numbers for the light are listed farther below.
Five Easy to Follow Steps:
1) Get a CEL.
2) On the passener side, remove the kick panel at the floor.
Behind it, is your ECU and a jumper plug.
3) Locate the jumper plug (Civic 1992-1995 is grey, 96-00 it is blue). It is a two pin plug.
(I am not sure if the connector is in the same location for all Honda's. I assume so - I do not know all the connector colors).
For EK, there is one brown wire and one black wire.
For EG, there is one tan wire and one green.
4) With the car off insert either a two pin connector clip, or loop a thin enough piece of wire into both holes on the connector.
5) Back in the driver's seat, turn the key to the 'on' position. The CEL light will come on at startup, like normal, but it will then begin to flash.
**By counting the number of flashes, you can decipher the CEL number.
Short flashes are single digits (half second)
Long flashes are 10's (one second)
CEL numbers List
1 O2A - Oxygen sensor number one.
2 O2B - Oxygen sensor number two.
3 MAP - manifold absolute pressure sensor.
4 CKP - crank position sensor.
5 MAP - manifold absolute pressure sensor.
6 ECT - water temperature sensor.
7 TPS - throttle position sensor.
8 TDC - top dead center sensor.
9 CYP - cylinder sensor.
10 IAT - intake air temperature sensor.
12 EGR - exhaust gas re-circulation lift valve.
13 BARO - atmospheric pressure sensor.
14 IAC (EACV) - 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 signa.L
36 traction control found on JDM ecu's.
41 Primary oxygen sensor heater.
43 Fuel supply system.
45 Fuel system too rich or lean.
48 LAF - lean air fuel sensor.
54 CKF - crank fluctuation sensor.
58 TDC sensor number two.
61 Primary oxygen sensor.
63 Secondary oxygen sensor circuit.
65 Secondary oxygen sensor heater wire (black wires).
67 Cat Converter.
71 random misfire cylinder one.
72 random misfire cylinder two.
73 random misfire cylinder three.
74 random misfire cylinder four.
80 EGR valve/line.
86 ECT sensor - cooling system.
91 Fuel tank pressure sensor.
92 EVAP solenoid/valve/vacuum lines.
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Thursday, January 26th, 2017 AT 6:52 PM