1990 honda accord CEL
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1990 honda accord CEL
Hello everybody I have a 1990 honda accord ex sedan and the CEL keep coming on but when I turn the car off and back on later the CEL is off. After driving it for about 20 minutes the CEL comes on again..does anyone know what are the possible causes of this? I really appreciate the help 
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Joined: Mar 2007
Posts: 11,399
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From: East Coast 506, Canada
Re: 1990 honda accord CEL
You need to retrieve the codes from the ECU. Use the self diagnostic procedure to read the codes that may be stored on the ECU.
Here is a link for the procedure;
https://honda-tech.com/forums/honda-accord-1990-2002-2/how-check-codes-96-accord-2301560/
Even though this says it is for the 96 Accord. the procedure is the same for the 90-93 Accord. the only difference is that the 2 pin connector is located behind the passenger side kick panel.
If the ECU keeps resetting every time you shut off the car. You will have to do the procedure while the light is still on and the engine running.
Here is a link for the procedure;
https://honda-tech.com/forums/honda-accord-1990-2002-2/how-check-codes-96-accord-2301560/
Even though this says it is for the 96 Accord. the procedure is the same for the 90-93 Accord. the only difference is that the 2 pin connector is located behind the passenger side kick panel.
If the ECU keeps resetting every time you shut off the car. You will have to do the procedure while the light is still on and the engine running.
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Joined: Mar 2007
Posts: 11,399
Likes: 69
From: East Coast 506, Canada
Re: 1990 honda accord CEL
Code 43 is a fuel supply issue, or it could be your O2 starting to fail/giving erratic readings.
Thanks 
If you are experiencing driving/performance issues there are 4 things to check.
1. Fuel Pump
2. Fuel Filter
3. Injector Resistor
4. Injector
Do you have a Helms, Chilton or Haynes manual or any other type of trouble shooting Honda manual? I ask only because they contain step by step tests that you can perform to check these 4 things before you go replacing parts.
If you don't have any major driveability problems then the code is probably stemming from a poor contact between the ECU and the O2. Did you buy an after market wire yourself O2 or a Plug and play OEM replacement?
There are also tests to check that the proper voltage signals are being sent by your O2 and received by your ECU in these manuals.
1. Fuel Pump
2. Fuel Filter
3. Injector Resistor
4. Injector
Do you have a Helms, Chilton or Haynes manual or any other type of trouble shooting Honda manual? I ask only because they contain step by step tests that you can perform to check these 4 things before you go replacing parts.
If you don't have any major driveability problems then the code is probably stemming from a poor contact between the ECU and the O2. Did you buy an after market wire yourself O2 or a Plug and play OEM replacement?
There are also tests to check that the proper voltage signals are being sent by your O2 and received by your ECU in these manuals.
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Re: 1990 honda accord CEL
I have a Haynes manual that I am gonna look at I just replaced the filter so I am guessing that should not be an issue..I occasionally start to idle a little rough but only for about 20 seconds..the first time i turn the car on each day its a little rough but after that I have no problems starting it up. and yea i loose power occasionally but very rarely. not yet im going to get the O2 sensor checked.
thanks for all the help I really appreciate it
thanks for all the help I really appreciate it
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May 7, 2015 05:15 AM