Question about 2004 Toyota Matrix

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2007 Toyota Matrix XR Idling is rough most when engine still cold. I already change the 2 oxygen sensors , PCV valve , MAF sensor and exhaust gasket.any suggestions?

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Idling goes down it is about .8 and engine shake little.some times work excellentI replace spark plugs with new but it is same.any sugestions?

Posted on Dec 08, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 178 Answers

SOURCE: maf?/ missfiring

have the map sensor checked to see if it is within range you say you have codes maf make sure all clamped duct work is tight and not loose clamps .iac motor clean bore if the pintle gets stuck will cause rough idle hesitation even no start conditions scan tools only test the idle air control valve motor not the bore that extends to block varnish gets built up on the pintle and in the bore wich binds the in and out operation

Posted on Sep 12, 2008

chazman05
  • 48 Answers

SOURCE: change oxygen sensor

They make a tool you can rent at auto zone for free. Its basically a modified socket.

+unplug wires
+ unscrew o2 sensor.


Posted on Dec 11, 2008

  • 1861 Answers

SOURCE: TOYOTA CELICA 2000

Go to your auto parts store & buy a can of "brake cleaner". Remove the MAF and spray it until the wires are shiny.
Do not use compressed air, that will break the wires.
BTW, the cat is covered for 8 years, under warranty.

Posted on Dec 16, 2008

  • 1986 Answers

SOURCE: toyota mr2 roadster 2001 engine light on code po141 oxygen sens

bank 1 will be whichever side cylinder 1 of your engine is and bank 2 will be the opposite side. It's named bank 1 and bank 2 so that no matter how the engine is laid out, bank 1 is always on the same side as cylinder 1. I cannot say whether the right hand or the left hand one will be bank 1 as I do not know where your cylinder 1 is. The garage should know

Posted on Sep 08, 2009

alicantecoli
  • 22156 Answers

SOURCE: check engine light on PO420 catalyst

change the O2 sensors

Posted on Aug 18, 2010

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Have p0171 code


A code P0171 may mean that one or more of the following has happened: The MAF (Mass Air Flow) Sensor is dirty or faulty Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry. There could be a vacuum leak downstream of the MAF sensor Possible cracked vacuum or PCV line/connection Faulty or stuck open PCV valve Failed or faulty oxygen sensor (bank 1, sensor 1) Sticking/plugged or failed fuel injector Low fuel pressure (possible plugged/dirty fuel filter!) Exhaust leak between engine and first oxygen sensor

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1998Pontiac Bonneville check engine light is on Code p0171 how can I fix this


  • Bank 1 Oxygen sensor fault: Possible causes:
  • The MAF (Mass Air Flow) Sensor is dirty or faulty
    Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
  • There could be a vacuum leak downstream of the MAF sensor
  • Possible cracked vacuum or PCV line/connection
  • Faulty or stuck open PCV valve
  • Failed or faulty oxygen sensor (bank 1, sensor 1)
  • Sticking/plugged or failed fuel injector
  • Low fuel pressure (possible plugged/dirty fuel filter!)
  • Exhaust leak between engine and first oxygen sensor
  • Solutions:


  • Solutions:


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    Jul 20, 2014 | Cars & Trucks

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    P0171 code


    A code P0171 may mean that one or more of the following has happened:
    The MAF (Mass Air Flow) Sensor is dirty or faulty Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.

    There could be a vacuum leak downstream of the MAF sensor

    Possible cracked vacuum or PCV line/connection

    Faulty or stuck open PCV valve Failed or faulty oxygen sensor (bank 1, sensor 1)

    Sticking/plugged or failed fuel injector Low fuel pressure (possible plugged/dirty fuel filter!)

    Exhaust leak between engine and first oxygen sensor

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    Code 171 error ford expedition 1998


    There are a multitude of things that could result in a PO171 trouble code.
    It might be the infamous PCV elbow problem.. Around 100K miles 5.4's are bad to rot out the PCV elbow on the back of the throttle body, this will cause bad idling problems and will throw lean codes when it gets really bad.
    Find the PCV valve in the passengers side valve cover and trace the tube around to the back of the throttle body. With the engine running feel around the rubber elbow and see if you have a vacuum leak.

    Here are some other things to try:
    1. call your local dealer and ask them what it could be
    2. Replace the front two Oxygen sensors.
    3. Clean MAF sensor (especially if you've installed a K/N filter - could coat the wires with oil that collects dust).
    4. Check/change air filter
    5. Change the fuel filter (under drivers side frame)
    6. Check fuel pressure

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    P0050 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 1)

    P0051 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 1)

    P0052 HO2S Heated Oxygen Sensor -Control Circuit High (Bank 2 Sensor 1)

    P0053 HO2S Heated Oxygen Sensor -Resistance (Bank 1 Sensor 1)

    P0054 HO2S Heated Oxygen Sensor -Resistance (Bank 1 Sensor 2)

    P0055 HO2S Heated Oxygen Sensor -Resistance (Bank 1 Sensor 3)

    P0056 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 2)

    P0057 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 2)

    P0058 HO2S Heated Oxygen Sensor -Control Circuit High (Bank 2 Sensor 2)

    P0059 HO2S Heated Oxygen Sensor -Resistance (Bank 2 Sensor 1)

    P0060 HO2S Heated Oxygen Sensor -Resistance (Bank 2 Sensor 2)

    P0061 HO2S Heated Oxygen Sensor -Resistance (Bank 2 Sensor 3)

    P0062 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 3)

    P0063 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 3)

    P0064 HO2S Heated Oxygen Sensor -Control Circuit High (Bank 2 Sensor 3)

    P0065 Air Assisted Injector -Range/Performance

    P0066 Air Assisted Injector -Circuit Malfunction or Circuit Low

    P0067 Air Assisted Injector -Circuit High

    P0068 (MAP) Manifold Absolute Pressure /(MAF) Mass Air Flow - Throttle Position

    Correlation

    P0069 (MAP) Manifold Absolute Pressure / (BARO)Barometric Pressure Correlation

    P0070 Ambient/Outside Air Temperature Sensor -Circuit Malfunction

    P0071 Ambient/Outside Air Temperature Sensor -Range/Performance Problem

    P0072 Ambient/Outside Air Temperature Sensor -Circuit Low Input

    P0073 Ambient/Outside Air Temperature Sensor -Circuit High Input

    P0074 Ambient/Outside Air Temperature Sensor -Circuit Intermittent

    P0075 Intake Valve Control Solenoid Circuit Malfunction (Bank 1)

    P0076 Intake Valve Control Solenoid Circuit Low (Bank 1)

    P0077 Intake Valve Control Solenoid Circuit High (Bank 1)

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    P0079 Exhaust Valve Control Solenoid Circuit Low (Bank 1)

    P0080 Exhaust Valve Control Solenoid Circuit High (Bank 1)

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    P0083 Intake Valve Control Solenoid Circuit High (Bank 2)
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    Idling rough in cold weather codes that come up are p1131 and p1151 need to know what these codes are and what parts they are


    DTC P1131 DTC P1151 indicates the system is correcting RICH for an overly LEAN condition. The Heated Oxygen Sensor (HO2S) voltage is less than 0.45 volts. This is usually due to a vacuum leak after the MAF. It can also be caused by a bad PCV valve or PCV system hose. It can also be caused by low fuel pressure or a plugged injector.

    Start with the simple and clean the MAF and the IAT sensor. In simple terms, the engine is running lean and is being compensated by the ECM. P1131 is bank 1 and P1151 is bank2

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    A code P0174 may mean that one or more of the following has happened:
    • The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
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      • In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner . Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
      • Inspect all vacuum and PCV hoses, replace if necessary
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