You can't. You need the codes and a scanner.
Simply pulling the battery cables will not work on this minivan, you must reset the codes with a code scanner. I disconnected the battery cables for 24 hours and still had to borrow a snap-on scanner from a friend to read and reset the codes.
Answering "How can you diagnose a 1998 Honda accord without an OBD scanner?"
Code P1684 simply means the battery was disconnected within the last 50 key starts. Either turn the key another 50 times with the battery connected, or use an OBD scanner to wipe the code.
Bring it to a shop that has an ABS scanner
You need an OBD scanner to diagnose faults and reset the lights. You can try disconnecting the car battery and reconnect after 10 ton15 minutes and it may do the trick
Disconnect the battery and leave it disconnected for at least 30 minutes, or have someone with a scanner, erase the code.
After reading the codes, with a scanner. You repair cause of code, and then can reset code with the scanner.
You need to go to a shop that has a scanner and they can retrieve the codes and diagnose the problem for you.
P0404 means:Exhaust gas recirculation circuit range/performance
use a scanner, or unhook battery.
Pretty simple connect an obd2 scanner and it will pull the error codes for the check engine light then look up the error code and diagnose and fix your problem
There are pages and pages of causes for a check engine light. You need to have it checked for codes with a scanner to know what to diagnose. After the repair you can clear the code with a scanner.