How can the computer not be able to diagnose car problem?

Asked by Jul 06, 2017 at 12:48 PM about the 2009 Honda Accord

Question type: Maintenance & Repair

A few years ago the starter of 2009 accord was replaced. As
I pulled out of repair shop, check engine light came on.  For
personal reasons, I don't trust them and went to the station
down the street who said something way down at the
bottom (of the engine???) was disconnected and would be
involved to reconnect but they did it.

After that, strange things have been happening.  The car will
only drive at 20mph or so, check engine light blinking.  Car
has no power to go up hills. At other times, VAS and solid
check engine light come on and car drives normally.

Car can go for months with blinking check engine light on
and car will not go above 20 mph & can not be used.  Then
it will act normally with no lights on for a period of a couple
of hundred miles or so.

Computer spits out codes, parts are replaced but car still
blinking.  How can the computer not know???  One time it
will say parts need to be replaced, the next time it will say
theses parts don't need to be replaced.

Is it possible for no one to diagnose a car?

3 Answers


Codes have to be interpreted as they can be caused by more than one thing. If you can post the codes and what has been done we can try to help.

Part of the problem is that the codes don't seem to be accurate. Was told code showed replacement part would be $2,000, they ordered part, because of price they said they would recheck codes before replacing. Got phone call with good news, code shows its not that after all. Nothing shows up as being wrong. Was told Car Had No Issues. And As Usual The Same Pattern Happens. Car Fine, No Check Engine Light on And Car Drives Normally For A Short Period Of Time. Then Blinking Check Engine Light Comes On, Car Will Drive too Slow To Drive IN traffic.. The WEirdest Thing Is That In the same Day It Can Blink And Not Be Usable At One Time That Day And Later in same day No Light And Drives Normally And Another Time vSA Light And Check Engine Light Together. This must be a clue that it can go back and forth like this in the same day How Can It Work Normally with No Check Engine Light At One Time During The Day And Later Blink And only Crawl A!ong? Its My Only Car, I Lost My financial support and can't get another car. Live where a car is a necessity. How can more than one mechanic not figure this out. Crank sensor was replaced and cam sensor. Didn't make any difference Thank you. I'm hoping someone out there likes a challenge and can help.


I think you should look for a better mechanic.

Your Answer


Looking for a Used Accord in your area?

CarGurus has 95,306 nationwide Accord listings starting at $1,300.


Honda Accord Experts

  • #1
    Tom Demyan
  • #2
  • #3
View All

Related Models For Sale

Used Toyota Camry
797 Great Deals out of 74,914 listings starting at $1,700
Used Honda Civic
356 Great Deals out of 53,231 listings starting at $1,200
Used Nissan Altima
752 Great Deals out of 67,899 listings starting at $750
Used Honda Accord Coupe
98 Great Deals out of 4,275 listings starting at $800
Used Nissan Maxima
217 Great Deals out of 17,895 listings starting at $1,995
Used Toyota Corolla
646 Great Deals out of 68,592 listings starting at $1,449
Used Honda CR-V
534 Great Deals out of 68,082 listings starting at $1,800
Used Acura TL
67 Great Deals out of 3,449 listings starting at $1,995
Used Hyundai Sonata
396 Great Deals out of 50,628 listings starting at $500
Used BMW 3 Series
935 Great Deals out of 33,171 listings starting at $1,000
Used Dodge Charger
275 Great Deals out of 32,939 listings starting at $495
Used Chevrolet Malibu
616 Great Deals out of 48,807 listings starting at $1,800
Used Kia Optima
348 Great Deals out of 29,384 listings starting at $1,950
Used Ford Fusion
639 Great Deals out of 60,227 listings starting at $2,300
Used Chevrolet Impala
366 Great Deals out of 26,939 listings starting at $1,000

Used Cars For Sale

2018 Honda Accord For Sale
68,769 listings starting at $19,991
2017 Honda Accord For Sale
49 Great Deals out of 3,211 listings starting at $13,299
2016 Honda Accord For Sale
44 Great Deals out of 2,294 listings starting at $11,995
2015 Honda Accord For Sale
123 Great Deals out of 6,582 listings starting at $8,995
2014 Honda Accord For Sale
96 Great Deals out of 2,352 listings starting at $8,999

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.