how can you tell if your ECM is bad in a 2003 honda accord

Asked by Jan 03, 2014 at 12:51 PM about the 2003 Honda Accord EX

Question type: Maintenance & Repair

2 Answers

264,005

Usually with some diagnostic equipment.

1 of 1 people found this helpful.
35

actually honda has its own built in diag system, if your CEL comes on and stays on its useally a good sign that youhave a bad ECU, however if you see it blink when you cycle the key to ON then you need to read the codes it has. You can do this WITHOUT any diag equipment. Honda has a blue plug up under your pass side kick panel. run a jumper wire on this then turn the key to ON dont try to start the car, just put it in the ON position, it will begin to blink in morse code to you, short blinks and long ones. Google will tell you what is what, "CAR GURUS" is worthless.

Your Answer

Honda Accord Experts

  • #1
    Tom Demyan
    Reputation
    2,230
  • #2
    JP1956
    Reputation
    1,770
  • #3
    Jonathan Ford
    Reputation
    1,610
View All

Related Models For Sale

Used Toyota Camry
1,074 Great Deals out of 86,816 listings starting at $800
Used Honda Civic
797 Great Deals out of 60,933 listings starting at $950
Used Nissan Altima
1,327 Great Deals out of 77,582 listings starting at $1,695
Used Honda Accord Coupe
163 Great Deals out of 6,814 listings starting at $1,691
Used Toyota Corolla
942 Great Deals out of 65,486 listings starting at $1,850
Used Nissan Maxima
322 Great Deals out of 21,817 listings starting at $1,200
Used Honda CR-V
885 Great Deals out of 59,638 listings starting at $1,495
Used Acura TL
115 Great Deals out of 4,194 listings starting at $1,875
Used Hyundai Sonata
892 Great Deals out of 56,572 listings starting at $1,500
Used BMW 3 Series
1,126 Great Deals out of 32,916 listings starting at $1,200
Used Kia Optima
536 Great Deals out of 32,842 listings starting at $995
Used Chevrolet Malibu
1,059 Great Deals out of 62,284 listings starting at $880
Used Toyota Avalon
221 Great Deals out of 15,989 listings starting at $997

Used Cars For Sale

2016 Honda Accord EX For Sale
6 Great Deals out of 191 listings starting at $15,700
2015 Honda Accord EX For Sale
36 Great Deals out of 788 listings starting at $10,995
2014 Honda Accord EX For Sale
33 Great Deals out of 663 listings starting at $10,495
2013 Honda Accord EX For Sale
5 Great Deals out of 214 listings starting at $8,458

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.