Question about 1996 Mercedes-Benz C-Class

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Mercedes C280 1996- What and where is a Mass or AirFlow Circuit Range/Performance problem- code Po101 and Fuel Trim Malfunction Code P0170, my car will not pass smog due to this, please help. Thanks

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This is difficult because the computer can't detect a problem, your car thinks everything is ok. In reality what is happening is the electrical component inside the MAF sensor becomes contaminated by the impurities in the air (heavies) These containments imbed themselves to electrical component that senses the air flow causing the sensor to be slightly off, but not enough to trigger the MIL (malfunction indicator lamp). Replace the MAF sensor with a new sensor and you're problem will go away, plus your car get better mileage and performance. (Mass Air Flow MAF sensor

Posted on Jul 14, 2009

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    What causes a P0170 code


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    Read more at: http://www.obd-codes.com/p0170
    Copyright © OBD-Codes.com

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    Code p0170 code p0480


    ode p0170 refers to fuel trim (FT) bank 1 malfunction==causes---intake leak--AIR system---fuel pressure/pump---injector/s--EVAP canister purge valve---HO2s
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    1 Answer

    How do you fix code P0170 in volvo s60 2.5t


    P0170 - Fuel Trim Malfunction Bank 1






    Possible causes
    - Intake air leaks
    - Faulty front heated oxygen sensor
    - Ignition misfiring
    - Faulty fuel injectors
    - Exhaust gas leaks
    - Incorrect fuel pressure
    - Lack of fuel
    - Faulty Mass Air Flow (MAF) sensor
    - Incorrect Positive Crankcase Ventilation (PCV) hose connection

    Tech notes
    Dirty air filter, air filter housing or Mass Air Flow (MAF) sensor, or faulty MAF sensor are common causes for the P0170 code.

    May 10, 2013 | Cars & Trucks

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    Fauld code p0170


    P0170 Fuel Trim (Bank 1)
    ____________
    new version fgtech v53

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    P0170 Fuel Trim Malfunction (Bank 1), could be fuel filter, mass air sensor, or low fuel pressure.

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    CHECK ENGINE LIGHT ON CODE P0170


    DTC P0170 applies to fuel trim malfunction on all 2.4L vehicles, 3.0L Federal vehicles and right bank (bank 1) on 3.0L California vehicles. 
    DTC P0173 applies to fuel trim malfunction on left bank (bank 2) on 3.0L California vehicles.
    DTC Set Criteria (2.4L)

    Engine is in closed loop control. Intake air temperature is more than 14°F (-10°C). Barometric pressure is more than 11 psi (76 kPa). Volume Airflow (VAF) sensor output frequency is 88 Hz or more. Code will set if long-range fuel correction is less than -12.5 percent, or more than +12.5 percent, for 5 seconds and short-range fuel correction is less than -10 percent, or more than +10 percent, for 5 seconds. 

    Engine is in closed loop control. Intake air temperature is more than 14°F (-10°C). Barometric pressure is more than 11 psi (76 kPa). VAF sensor output frequency is less than 88 Hz. Code will set if long-range fuel correction is less than -12.5 percent, or more than +12.5 percent, for 5 seconds. On 2.4L code will also set if short-range fuel correction is less than -15 percent, or more than +15 percent, for 5 seconds. On 3.0L Federal code will also set if short-range fuel correction is less than -13.5 percent, or more than +13.5 percent, for 5 seconds. 

    Have the O2 Sensor changed on the Right Bank, ( passenger side of the Engine, or where the # 1 cylinder is.)
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    Engine codes P0101 and P0170


    P0101 Mass or Volume Air Flow Circuit Range/Performance Problem
    Air flow sensor problem, maybe causing the second code to go off.
    The air flow sensor should be right near your air filter box.
    P0170 Fuel Trim Malfunction (Bank 1) Oxygen Sensor

    Mar 26, 2009 | 2006 Volvo S60

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