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Thread: Engine runs rough

  1. #1
    Join Date
    Jun 2010
    Location
    Charleston, SC
    Posts
    9

    Default Engine runs rough

    Newb here, though I have flushed the tranny

    My wife was driving yesterday and the car started knocking badly. She went to autozone and pulled the codes. It had:

    P0132 - O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)
    P0234 - Turbocharger (TC) control valve
    P0301 - Cylinder 1 Misfire Detected
    P2187 - Long-term fuel trim?
    P2407 - Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic (gas cap?)
    P0700 - Transmission Control Function
    P0704 - Clutch Switch Input Circuit Malfunction

    The car idles rough and seems to be really rough when you rev the engine. For some background, I think the P07XX codes are older codes from the tranny. I flushed it due to having the 'Transmission Service Required' light, which is no longer in by the way.

    I reseated the gas cap just in case. No change.

    I hope it is a single problem causing this problem, and obviously that the single problem isn't going to cost me $5K. O2 sensor maybe?

    Any help would be greatly appreciated.

    Dave

    PS. I have a 2003 XC70 with 192K miles. Been a great car, but the expensive repairs are starting to get a little old, which is why I am trying to learn to do them myself.

  2. #2
    Join Date
    Mar 2005
    Location
    Pacific Northwest
    Posts
    1,485

    Default

    Thats a lot of different stuff on this code list. This car stores all the codes it ever encountered unless someone clears it. Every car I've put my Volvo VIDA/DiCE tool on gave a full fault code report for several years. Many of them are no longer active. All codes basically will come with the following info but probably need the Volvo tool to get the details

    When it occurred, how many times it occurred since the first time, when was the last time it occurred

    Don't know what diag tool autozone uses but I wonder if they are pulling out all the codes including the currently inactive ones.
    SOLD 2001 V70XC @123k 20mpg. 2001 V70 T5 @132k 22mpg. No more Volvos due to shift to better gas mileage
    2013 Tesla Model S 85kWhr 23k miles 90 eMPG
    2011 Toyota Prius Model2 51k 52mpg
    2007 Toyota Prius 130k 45mpg
    http://freewebs.com/howardsvolvos/

  3. #3
    Join Date
    Dec 2004
    Location
    Connecticut, US
    Posts
    209

    Default

    I would check the coil pack first.

    DYZ
    2005 Volvo XC70, Ash Gold, 163K miles

  4. #4
    Join Date
    Nov 2006
    Location
    Savannah, GA
    Posts
    552

    Default

    Clear the codes, drive, then pull codes again, see what stuck.

  5. #5
    Join Date
    Jun 2010
    Location
    Charleston, SC
    Posts
    9

    Default

    I am going to change the spark plugs and changeout the coil on the 1st cylinder.

    Dumb question. Do I have to take it to a dealer to clear the codes? I know there is a way to clear the service light. Do I just do that?

  6. #6
    Join Date
    Nov 2006
    Location
    Savannah, GA
    Posts
    552

    Default

    No. Disconnect the positive lead from your battery and place it to ground for twenty seconds. Dumps the data to ground. Harmless.

  7. #7
    Join Date
    Jun 2010
    Location
    Charleston, SC
    Posts
    9

    Default

    Sweet, I will do that after the plugs tomorrow. Thanks!

  8. #8
    Join Date
    Jun 2010
    Location
    Charleston, SC
    Posts
    9

    Default

    Another question. This item is in front of my air filter housing. My wife found it was open yesterday. What is it? Is there supposed to be something in it? Enclosed are two pics...


    Click image for larger version. 

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ID:	4495Click image for larger version. 

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ID:	4494

  9. #9
    Join Date
    Nov 2006
    Location
    Savannah, GA
    Posts
    552

  10. #10
    Join Date
    Jun 2010
    Location
    Charleston, SC
    Posts
    9

    Default

    I loaded two pics; there is an item forward of the air filter housing. It is plastic, and unscrews. When all this happened, my wife looked under the hood and saw it was apart. We screwed it back together. Do you know what it is, and is there supposed to be something inside of it?

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