Engine lights up!

marc-111marc-111 Wagonist
in Engine & Drivetrain
everytime im cruisin the highway like maintaning a certain high speed for like 2-3 mins my engine light lights up :x then i would pull over turn the ignition off then turn it on again for it to turn off and the only way i could drive my car without lighting up the engine light is to play with the gas pedal gently

btw i swaped a d16y7 head and block on mine but i used everything from the stock d16a6 parts like intake mani, exhaust, harness, etc.

Comments

  • davensdavens familEE
    Check for codes on the ecu.
  • shenrieshenrie Council Member
    davens wrote:
    Check for codes on the ecu.

    Exactaly, but Im guessing its the O2 sensor. Have you installed a header in the last little while? Every time I install a header on a car for the first time, it throws a code everytime I get on the freeway. A O2 code will generally blink once.
  • marc-111marc-111 Wagonist
    how do u do that?
  • marc-111marc-111 Wagonist
    the header is the stock d16a6 one, how did u fixed yours?
  • davensdavens familEE
    marc-111 wrote:
    how do u do that?

    In the immortal words of David Moore: Its in the frickin' manual!

    I get tired of spoon feeding this stuff to people, so I'll get you started but you're going to have to do a little work yourself.

    A. Find the ecu
    B. Look at the LED. Count the blinks.
    C. Look up what X number of blinks mean.
  • duckie8310duckie8310 Senior Wagonist
    :lol:
  • shenrieshenrie Council Member
    This is the step prior to step A from davens (which btw Im with you 100%):

    Pull back carpet on passenger side floorboard. Then proceed to step A.
  • marc-111marc-111 Wagonist
    oh i see my bad, :shock:

    thanks!
  • marc-111marc-111 Wagonist
    shenrie wrote:
    davens wrote:
    Check for codes on the ecu.

    Exactaly, but Im guessing its the O2 sensor. Have you installed a header in the last little while? Every time I install a header on a car for the first time, it throws a code everytime I get on the freeway. A O2 code will generally blink once.

    mine blinked once so i followed the one on a manual and pulled the HAZARD fuse for 10 secs then after puttin it back it was gone but as soon as i use it on the freeway it lights up again????? :x

    btw i also tried takin it off for more than 10 secs but as soon as i use it at the freeway my engine lights up!
  • duckie8310duckie8310 Senior Wagonist
    all that does is it resets your ECU. usually this is done when a new part is installed, so the ECU has a chance to re-adjust to the new part (ie fuel mix etc) sometimes the ECU fibs, so there might be an underlying problem here.

    anyone else have an idea?
  • davensdavens familEE
    Okay, it sounds like you're getting a code 1 for the o2 sensor.
    So you reset the ecu to verify there is actually a problem and its not a fluke.
    The problem returned/verified itself.
    So now you have to figure out why the ecu is getting an o2 sensor reading that is outside of the acceptable range.
    1. Is the sensor still good? They eventually go bad, especially with +100k on them. A new Bosch with OE connectors is like $35-40 at a local Autozone. They also "rent" an o2 socket that makes removing/installing one a whole lot easier.
    2. If the new sensor sets off the same code again, its pretty much down to a fuel mixture problem. You are running too rich or too lean and the sensor is alerting the ecu. There are a dozen reasons this could be happening...but...start with the sensor.


    Again...the troubleshooting steps are in the manual. You found out how to reset the ecu. In roughly the same area, there are flow charts for diagnosing each code.
  • marc-111marc-111 Wagonist
    i think im running to lean or rich coz when i try cruisin at a certain speed like 50mph or higher it lights up then when i try beating it up at high rpms it lights up,
  • akiraboyakiraboy HondaCivicWagon.com Founder
    re-verify your codes and make sure you're not getting multiple readings, honda ecus will progressively display codes if there are more than 1
  • sic944tsic944t Wagonist
    ive had this problem twice recently 2 dif cars just replace the o2 thats the problem i promise
    hehehe your thinking to hard at this point ....
  • marc-111marc-111 Wagonist
    thats what i did and the problem was gone :lol:

    thanks!
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