Question about Honda Civic

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I have a 02 civic si, engine is a k20a3, I have a check engine light that comes on when I'm going home up a mountain that I travel on. The trouble code reads manufacturer control air/fuel metering and doesn't let the engine go past 4,000 rpm. I've notice when it's getting ready to come on that I hear a sparking sound coming somewhere from the car before it comes on. Where is the problem causing this so I can get it fixed without spending 90 dollars to have a dianogstic done.

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The fuel air mixture is controled by the car's computer with information it gets from the oxygen sensor and several other sensors measuring air temperature, manifold pressure outside air pressure, air flow into the engine, throttle position and others.

I could bet, the most influential of these is the oxygen sensor that is located in the exhaust pipe on the passenger's side just behind the engine, changing it is very easy and could bring your car's fuel economy back to what it should be.

Also, in this site comment about this fault code and how to text before to buy and lost money: CHECK IT.

Tell us news.

Posted on Aug 07, 2010

  • ZJ Limited
    ZJ Limited Aug 07, 2010

    Also, I can heard that this is a common problem with the VTEC systems, the car revs up to about 3500 or 4000rpm, and then
    it just starts revving the engine really high but the cars moving at
    the same speed,
    it could just be the solenoid itself restricting oil flow at engagement point. One Honda owners tell that found out had blown head gasket and chip block and all this good stuff.

    Too, the Mass Air Flow sensor could be malfuncting causing bad O2 sensor readings also. When the owners really make to check the sensors, find answer like this (quote)...
    I failed a PA emmissions test with the following codes:

    P1166 Primary HO2S (No. 1) Heater System Electrical

    P1167 Primary HO2S (No. 1) Heater System

    I'm dirt poor at the moment so replacing the O2 sensor (at $220+) was
    the last thing i wanted to replace. I tested the circuit and fuses, but
    everything looked ok. I called the dealer a few times to see if they
    can give any advice, but they weren't much help (go figure)
    I finally talked to and a local, reputable diag place and the old
    timer told me that its probably the sensor since they go bad around 60k
    miles anyway. I bought one from AutoZone for $245, rented their socket
    and installed it in about 2 minutes. About 2 miles later the light was
    off! wooooooo!

    Good luck.

  • mattmm_06 Aug 08, 2010

    I have replaced the O2 sensor and nothing happen. Couple miles later it came back on. I finally got some advice from the dealership and they said that it's either the filter screen for the vtec or the vtec soleniod itself, but was told to check and clean that screen before buying the vtec soleniod. I pulled the vtec body off and sure enough the screen was totally stopped up. I could barely see any light come through it. So far so good. The check engine light hasn't came on.



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