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Fuel trim bank 1 P0170 Mod$E1 2000 subaru outback

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Posted on Jan 02, 2017

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SOURCE: 1997 subaru legacy 2.5 emission code P0170 fuel

If I am correct the po170 code is a lean condition. Usually this is caused by a cracked air duct leading to the air filter. Or the air filter box is not secured properly. I work in the service department at subaru and when we do big services we dont get the air box on right and customers return with a check engine light with the same code and we always find that the air box is not secured. This does not mean this is the issue, for a fuel trim code could be other issues, but I would definately look at this first before getting into a/f sensors, converters and all those other expensove items.

Posted on Jun 26, 2009

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SOURCE: 1996 Subaru Outback Engine Code P0170

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

Posted on Jan 02, 2010

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What is a fuel trim bank 1 on a 2006 xc90 volvo an whatvis a evap emission system switching valve mean


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    Jul 20, 2016 | 2006 Volvo XC90

    1 Answer

    How to fix code p0170 in a 2000 subaru outback


    P0170 Fuel Trim Malfunction (Bank 1) OBD-II Trouble Code Technical Description Article by Dale Toalston ASE Certified Technician Fuel Trim Malfunction (Bank 1) What does that mean? This code is one that surfaces with certain makes of automobiles more than others. In writing this article I've added Mercedes-Benz-specific info since it seems that M-B (and VW) are most prone to having this P0170 surface along with misfire codes or other fuel trim codes. P0170 means there was a malfunction in the computer's control of the air:fuel ratio. It also indicates that the fuel trims reached their limit of adding fuel while trying to compensate for a actual or perceived rich condition. When the fuel trims reach their rich correction limit, the PCM (Powertrain Control Module) sets a P0170, indicating a problem or malfunction in the fuel trims. It may also have a P0173 referring to the same malfunction but on bank two. Symptoms Symptoms of a P0170 DTC may include: MIL (Malfunction Indicator Lamp) Illumination Start and stall Poor fuel economy Black smoke at tailpipe Hesitation/misfire at idle or under load Causes Potential causes include a vacuum leak, unmetered air leaks Fuel saturated engine oil Leak in turbo air charge hoses (if equipped) Possibly bad O2 sensor (If Mercedes, may require adaptation with M-Benz compatible scan tool.) Oil contamination in MAF connector or O2 sensor connectors. Also check ignition coils, cam and crank sensors, and oil sensor for leakage contributing to oil intrusion in wiring harness. Defective MAF (Mass Air Flow) sensor (especially on Mercedez-Benz and other European autos. There are a lot of problems with aftermarket MAF sensors.) Defective fuel pressure regulator Leaking camshaft adjuster solenoids (Mercedes-Benz). NOTE: for some Mercedes-Benz models there is a service recall for a crankcase vent hose located under the intake manifold. It should be checked for leaks/cracking and also operation of check valve in the hose. The check valve should flow only one way. Possible Solutions It should be stated right off the bat that the most common problem associated with this code is the MAF sensor or air mass meter. This is especially the case with Mercedes-Benz and Volkswagen and other European cars. At time of writing, you don't normally see this code with American-made cars, and minimally with Asian, and, to be honest, I have no idea why. It appears to me that the PCM (powertrain control module) logic used by some European car manufacturers to set a P0170 (or P0173) fault code simply isn't used by American vehicle manufacturers. It is more common to see P0171, 0174, 0172, 0175 codes set with regard to fuel trim malfunctions on American cars. There is very little information on the setting conditions for a P0170, or P0173, but what information that is available almost seems to be a redundancy of the P0171,4,2 & 5 setting conditions. I'm sure there's a reason for it, but I can't get anyone to tell me what that is. The similarities between them may be why we don't see this code surface on domestic vehicles very often. It's simply unnecessary. So, simply put, if you have a P0170, your PCM noticed that the fuel trims reached their rich correction limit. Basically it's adding fuel to try to compensate for a lean condition, real or perceived. If you have this code and access to a scan tool, observe the MAF sensor reading in grams/sec. The reading will be different for different automobiles, so get a good spec. I'm going to stick with what would be normal for a Mercedes (1.8L), since they have the bulk of the trouble. Expect to see at idle 3.5-5 g/s (ideally). At 2500 RPMs with no load it should be between 9 and 12 g/s. On road test, at WOT (wide open throttle) it should be 90 g/s or well above. If it's not in specs, replace it. Be careful of Ebay MAFs. Often they don't work according to OE specifications. If the MAF checks out and there is no oil intrusion at the connector, check fuel pressure and ensure that there are no leaks at the regulator internally or externally. Check all vacuum hoses and confirm none are cracked, disconnected or missing. Make sure there are no vacuum leaks at the intake manifold gaskets or tears in the air supply hose. If the engine is turbo charged, be sure the hoses are in good condition and have no leaks. Leaking turbo pressure hoses could cause a rich condition. Inspect the condition of crankcase vent hose under intake manifold and operation of check valve in the hose. (In the "What are the causes?" section) If there doesn't appear to be any problems with the fuel pressure, MAF or vacuum hoses, then inspect the O2 sensor connectors for oil intrusion. A bad O2 sensor could cause a P0170, or P0173. Repair cause of oil leak and replace oil-fouled O2 sensor.

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

    May 13, 2015 | 2000 Subaru Outback

    2 Answers

    How to fix code p0170 hiundai tiburon


    Code P0170 indicates a bank 1 fuel trim problem. Probable causes:
    1. Faulty sensor or solenoid
    2. Control unit software needs updating
    3. Faulty PCM or ECM
    4. Fuel pressure problem. Check pump, regulator,filter, and lines

    Apr 22, 2014 | 2007 Hyundai Tiburon

    1 Answer

    Dash symbol car with spanner through


    Your car only has one bank, so this code applies for the entire engine. I'll provide a link that gives a good breakdown of what P0170 means, possible causes, and possible corrections.
    P0170 Fuel Trim Malfunction Bank 1

    Aug 01, 2017 | Cars & Trucks

    1 Answer

    P0170 runs rough


    code p0170 refers to fuel trim (FT) bank 1--malfunction===causes--intake leak---AIR system fuel pressure/pump/injectors--EVAP canister purge valve--HO2s
    It also refers to heated oxygen sensor (HO2S) 3 bank 1--circuit malfunction===causes --wiring---HO2S--ECM

    fix the o2 sensor and the purge valve and you may be on the way to fixing the faults.

    Dec 26, 2013 | 1993 Suzuki Samurai

    1 Answer

    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
    Code p0480 refers to engine coolant blower motor 1--circuit malfunction===causes---wiring---engine coolant blower motor---ECM

    Dec 14, 2013 | Cars & Trucks

    1 Answer

    2006 kia spectra oem code p2626, p0171, p0170??


    P2626 O2 Sensor Pumping Current Trim Circuit/Open
    P0171 System too Lean (Bank 1)
    P0170 Fuel Trim Malfunction - Bank 1.

    Try changing the fuel filter first. Then you will have to clear the code with a jumper.

    Check here:
    http://www.troublecodes.net/Kia/

    Oct 28, 2013 | 2007 Kia Spectra LX Sedan

    2 Answers

    Fauld code p0170


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

    Mar 09, 2013 | Cars & Trucks

    1 Answer

    2002 suburban


    Are you sure it is a trans code. Everything that I have found states that P0170 is a fuel trim problem?P0170 Fuel Trim Malfunction (Bank 1)

    The code P0170 means that the air-fuel mixture coming in to the engine is too lean, or too rich. Usually it's the lean condition that causes this code. The code P0173 means the same, only for the Bank 2. Some car manufacturers list the description for the code P0170 as self adaptation out of limits.
    The code P0170 could be caused by a number of reasons, such as vacuum leaks, bad PCV valve, or other parts of crankcase ventilation system, low fuel pressure, bad oxygen sensor, bad MAF sensor or even a bad EGR vlave.

    Apr 05, 2012 | Chevrolet Suburban 1500 Cars & Trucks

    1 Answer

    1996 Subaru Outback Engine Code P0170


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

    Jan 02, 2010 | 1996 Subaru Impreza

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