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Check Engine Light Came On, Got The Codes From Autozone, What Do They Mean

Posted in Headlight Bulbs | Asked on Aug 20, 2011

I drive a 1997 Honda Civic DX 4door
If it helps, my headlights will sometimes flicker and my speedometer is going screwy, all up and down and all over, this started as soon as the check engine light came on.

Here are the codes:
P0135 (A/F sensor 1 system malfunction)
Probable Cause: 1) Open or short circuit malfunction
2) Poor Electrical Connection
3) Faulty A/F sensor 1

P0141 (Secondary HO2S12 (Heated oxygen sensor – Bank 1 Sensor 2) circuit heater malfunction)
Probable Cause: 1) Open or short circuit condition
2) Poor Electrical Connection
3) Faulty HO2S12 (Bank 1 Sensor 2)

P1298 (Electric Load detector (ELD) circuit high input)
Probable Cause: 1) Open or short circuit condition
2) Failed ECM

So… yeah, can anyone please give me some insight into what these mean and what I should do about it? By the way, I checked my fuses under my hood like the autozone guy suggested, none of them looked burnt out.

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There are 3 Answers for "Check Engine Light Came On, Got The Codes From Autozone, What Do They Mean"

  1. Steven P says:

    You might need to have your computer ” flashed ” or reprogrammed before you start replacing parts unnecessarily. Although you have codes saying sensors I have seen many people pay large amounts of money to replace these sensors only to have the light come back on saying the same codes, Have a garage that does major engine work check it out -

  2. Nc says:

    Sound like you got some serious electrical problem. Go to a good mechanic shop.

  3. Don R says:

    If this started happening after the aftermarket stereo and subwoofer was installed, dog-sniff though that installation and correct bad connections there. Otherwise, start testing the suspect sensors as per Chilton’s Auto Repair manual. The cascade of problems might originate with the first sensor in the line of circuits. Make sure all connections are cleanand tight. OR, go to the dealer service with the big wallet and list of trouble codes so you don’t need to pay the $50 or more for them to scan the car.