Hey all - first post here. Yesterday the check engine light lit on my car. I had been messing around with the car - I changed the coolant the day before and replaced the battery two days previous. I tried disconnecting the battery to reset the OBC, but the message immediately came back. I can't think of anything I disturbed or damaged during maintenance to cause the "check engine" message; it could be simply coincidence. Has anyone experienced this problem before after doing battery or coolant maintenance?

If it is simply a coincidence, can someone tell me which are the likely suspects causing the message, ie, O2 sensor, etc?

Thanks in advance for the advice.

 

Short out the blue connector in the passenger kick panel to retrieve the code. How long did you disconnect the battery for???

 

Thanks for the reply - I disconnected the battery for over 2 hours. Where can I find a fault table or decoder for the ECU download? Oh, and which pins should I jump on the connector. Appreciate the help....

 

Where can you get the codes to know what your ecu is throwing.

 

1 O2A - Oxygen sensor #1
2 O2B - Oxygen sensor #2
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 centre 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 signal
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 #2
61 Primary oxygen sensor
63 Secondary oxygen sensor
65 Secondary oxygen sensor heater
OBD II specific codes
67 Catalyst system efficiency below threshold
70 Automatic transmission malfunction
71 Cylinder 1 misfire or a random misfire
72 Cylinder 2 misfire or a random misfire
73 Cylinder 3 misfire or a random misfire
74 Cylinder 4 misfire or a random misfire
75 Cylinder 5 misfire or a random misfire
76 Cylinder 6 misfire or a random misfire
80 Exhaust gas re-circulation
86 ECT (engine coolant temperature) sensor
90 Evaporative emission control system
91 Fuel tank pressure sensor
92 Evaporative emission control system (insufficient purge flow)

 

Thanks. Long Flash = 10, short =1, right?

 

yup

 

my 98 civic have a check engine light too... what do i have to do to get the codes? thanks

 

 

How do u short out the blue connector? thanks... sorry i'm new with this

 

use a bent paper clip or even a bent fuse. anything that jumps the 2 wires works. i use a fuse with one bent wire that i can just plug in there and read the code without having someone hold it for me.