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Map sensor or manifold air pressure - PT Cruiser Chrysler Cars & Trucks

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What is your question? Those are two sensors that can drastically affect engine performance. Did you get a Check Engine or Service Engine Soon light? If so, did you or someone else read the diagnostic trouble code (DTC) stored in your Cruiser's onboard computer (ECM). What was the code or codes? What is the engine doing or not doing? More information, please.

Posted on Oct 11, 2013


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Posted on Jan 02, 2017

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SOURCE: (map) Manifold Absolute Pressure


Posted on Jul 28, 2009

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SOURCE: how do i replace a( map) sensor -manifold air sensor

hayes has a great bible for your car i would sugest getting 1 and read a little

Posted on Jan 03, 2010


Google the codes & use some web site,
to find the answers & solutions

Posted on Apr 02, 2013

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How do you know if a map sensor is gone?

You test it.

  • Map Sensor Testing - YouTube
    • 6 MIN
    2009-03-15 · Map Sensor Testing manifold absolute pressure ... This feature is not available right now. Please try again later.
  • Part 1 -How to Test the MAP Sensor with a Multimeter (GM 2 ... > GM > 3.1L, 3.4L Testing the GM manifold absolute pressure (MAP) sensor on your GM 2.8L, 3.1L, or 3.4L V6 equipped car can be accurately done using only a multimeter and a vacuum ...
  • Testing MAP sensor - GM Forum - Buick, Cadillac, Chev ...
    • 1 POST
    • FIRST POST: 2009-03-30
    2009-03-30 · Possible indications of a bad MAP sensor. Late shifting or harsh shift, incorrect/rough idle, stalling, surging, lack of power. Check the following
  • Geeks On Cars: How to Test a Map Sensor > Do It Yourself Car Maintenance How to Test a Map Sensor. The manifold absolute pressure sensor, or MAP sensor, monitors the amount of air flowing through the air intake system.
  • Manifold Absolute Pressure MAP Sensors - Manifold Absolute Pressure MAP Sensors ... MAP sensors are called manifold absolute pressure sensors rather than intake vacuum sensors because they ...

  • Map Sensor Testing

    Mar 19, 2016 | Cars & Trucks


    MAP - Manifold Absolute air Pressure sensor

    1.9) MAP- Manifold Absolute air Pressure (sensor)

    What is it? The MAP sensor is a device tomeasure the relative air pressure drop in the inlet manifold, as compared toatmospheric air pressure, when the engine is running.

    Where is it located? The MAP sensor is most frequently sited either remotely on the middle ofthe fire wall (bulkhead) at the back of the engine compartment, on the innerwing (fender), on the side of the air ducting or directly bolted on to theintake manifold plenum. A vacuum hosefrom the inlet manifold connects remotely located MAPs, but if sited on themanifold plenum there is a direct connection on its underside.

    How does it work? When the engine is at idle the throttle plate is fully closed and thevacuum within the inlet manifold is at its greatest, 20 inches (~500mm) mercury.On older MAP designs, sealed bellows (as in a weather barometer) expand orcontract in response to pressure change and this moves an armature in or out ofan electrical coil. The voltage output fromthe coil reflects the position of the armature and therefore the air pressure.
    Modern MAP sensors aresmall, membrane-mounted, solid-state, Piezo electronic, strain-gauge sensor devicesproviding the ECU with electrical signal corresponding to the absolute airpressure within the inlet manifold. The air pressure taken in conjunction withair temperature (IAT) provides the ECU with information on the overallmass of air taken in by the engine and it can therefore calculate theappropriate amount of fuel to inject, providing power whilst minimizingemissions. This device also helps adjustthe engine to accommodate pressure decrease with increase in altitude. In normally aspirated engines MAPs measureinlet pressure decrease in the inlet manifold relative to atmospheric pressure butin turbo charged engines MAPs are also capable of measuring the positive (over)pressure of air (boost) delivered to the inlet manifold from the turbo charger.

    Symptoms of a faulty MAP
    Associated OBD2 error codes DTCs: P0105 - P109; P0121, P0129; P0236 - P0238;P1296, P1297

    • Poor starting/erratic idling/engine stall - with the MAP not sending the correct inlet air pressure signals to the ECU, incorrect fuel injection volumes then result. The imbalance in the fuel/air ratio often leads to rough engine performance and poor starting and stall. The engine might be kept running at start up by pumping the accelerator pedal
    • Sluggish performance/power ceiling - the engine may seem to perform normally in the lower rev range but will severely run out of power above about 3000 rpm
    • Poor fuel economy. The ECU tends to supply an over rich fuel mix to the engine in the absence of signal from the MAP resulting in very poor fuel economy. The reason for this is that if the MAP has no signal this means no vacuum = fully open throttle = engine is under load. To match this 'open throttle' signal the ECU increases the injection cycle to supply more fuel.

    How to Check? The device has three electricalpins, one for 5 volts reference, one for 0 volts ground and the third (themiddle one generally) is the 'signal' output. Put a voltmeter positive connector on the 'signal' pin of the connectedsocket (back probe by inserting a bit of wire). Apply suction to the vacuum input, even sucking on it with your mouth,should result in a measurable voltage output. At normal air pressure (open throttle) the voltage seen should be 0volts. As vacuum is applied the voltageoutput should change to about 5 volts (throttle closed at idle). If no transition seen the MAP is faulty.

    How to Fix? Replace it

    NEXT 1.10) IMR - Intake Manifold Runner valve

    on Jul 22, 2011 | Mercedes-Benz E-Class Cars & Trucks

    1 Answer

    Where is map sensor located on a 94 Cadillac DeVille 4.9 engine

    Under hood, center, rear engine area, above valve cover, mounted in bracket.


    Manifold Air Pressure Sensor

    Fig. MAP sensor specifications-note how altitude and pressure affect the voltage readings

    1. Remove the intake manifold top cover.
    2. Disconnect the crankcase breather tube from the throttle body.
    3. Remove the MAP sensor from the intake manifold.
    4. Detach the MAP sensor electrical connector.
    5. Inspect the MAP sensor grommet for wear or damage and replace as needed.
    To install:
    1. Installation is the reversal of the removal procedure.


    Feb 14, 2016 | Cadillac Cars & Trucks

    1 Answer

    06 f250 5.4 code r107

    Do you mean p0107 ? If so that is P0107 Ford - Manifold Absolute Pressure/Barometric Pressure Sensor Low Input

    Possible causes
    - Faulty Manifold Absolute Pressure sensor
    - Manifold Absolute Pressure harness is open or shorted
    - Manifold Absolute Pressure sensor circuit poor electrical connection
    - Faulty Engine Control Module (ECM) help.jpg What does this mean?
    When is the code detected?
    The ECM has detected a performance fault with the MAP sensor
    Possible symptoms
    - Engine Light ON (or Service Engine Soon Warning Light)
    - Engine rough idle
    - Engine hesitation
    P0107 Ford Description
    The Manifold Absolute Pressure (MAP) sensor provides instantaneous manifold pressure information to the engine's Engine Control Module (ECM). The data is used to calculate air density and determine the engine's air mass flow rate, which in turn determines the required fuel metering for optimum combustion. A fuel-injected engine may alternately use a Mass Air Flow (MAF) sensor to detect the intake airflow.

    Jul 16, 2014 | 2002 Ford F250 Super Duty SuperCab

    1 Answer

    What is code 22 in a f350 Gas engine

    Manifold absolute pressure (MAP) sensor circuit out of range. The MAP sensor measures the air pressure inside the intake manifold. Vacuum is created there and maintained in a running engine (so pressure inside the manifold should be lower than outside air pressure).
    If you put a vacuum gauge on a manifold vacuum tap, and have a reading of less than 17-22 in., with the engine idling, you probably have a vacuum or air leak, and the sensor and its circuit is probably good. Or you could test the circuit if you have a voltmeter- then either the sensor is bad or you have a vacuum/air leak.

    Jun 13, 2014 | Cars & Trucks

    1 Answer

    What is a MAP sensor on a 2001 hyundai accent

    It is a sensor located on the air intake to your engine. It controls how much air your car pulls in for combustion. Following is the wiki definition:

    The manifold absolute pressure sensor (MAP sensor) is one of the sensors used in an internal combustion engine\'s electronic control system. Engines that use a MAP sensor are typically fuel injected. The manifold absolute pressure sensor provides instantaneous manifold pressure information to the engine\'s electronic control unit (ECU - computer that runs the engine). The data is used to calculate air density and determine the engine\'s air mass flow rate, which in turn determines the required fuel metering for optimum combustion and influence the advance or retard of ignition timing.

    Feb 09, 2014 | 2001 Hyundai Elantra

    2 Answers

    What is the function of map sensor


    Jun 08, 2013 | 1992 GMC Sierra

    1 Answer

    Get codes p0068 and p0108

    codes p0068 refer to Manifold pressure sensor/mass air flow sensor--throttle position correlation--causes ---wiring---map sensor---maf sensor--mechanical fault.
    code p0108 refers to manifold absolute pressure(map) sensor/barometric pressure (BARO) sensor--high input. causes ---wiring short to positive---map sensor---baro sensor---ecm.

    Mar 28, 2013 | 2002 Dodge Intrepid

    2 Answers

    Po108 service code

    OBD II Fault Code
    • OBD II P0108
    Fault Code Definition
    The Manifold Absolute Pressure Sensor/Barometric Pressure Sensor measures the rise and fall of the air pressure inside the Intake Manifold. This provides critical data needed for the Power Train Control Module (PCM) to control the Air Fuel Ratio, the Ignition Spark Timing, and many components of the Emissions Control Systems. The Manifold Absolute Pressure/Barometric Pressure Sensor converts the Intake Manifold air pressure into a voltage that is high when the Intake Manifold air pressure is high and low when the Intake Manifold air pressure drops to a vacuum. The P0108 code indicates a high voltage input from the Manifold Absolute Pressure Sensor/Barometric Pressure Sensor to the Power Train Control Module.
    • Check Engine Light will illuminate
    • In many cases, no abnormal symptoms may be noticed
    • In some cases, the engine may be hard starting and/or get poor fuel economy
    • In some cases, noticeably poor engine performance may occur
    Common Problems That Trigger the P0108 Code
    • Manifold Absolute Pressure Sensor/Barometric Pressure Sensor is defective
    • Intake Manifold vacuum leaks
    • Faulty or corroded Manifold Absolute Pressure Sensor/Barometric Pressure wiring or connections
    Common Misdiagnoses
    • Manifold Absolute Pressure Sensor/Barometric Pressure Sensor is replaced when the real cause is an Intake Manifold vacuum leak
    • Manifold Absolute Pressure Sensor/Barometric Pressure Sensor is replaced when the real cause is a stuck-open EGR Valve
    • Manifold Absolute Pressure Sensor/Barometric Pressure Sensor is replaced when the real problem is a defective Idle Air Control Motor, which causes a very low engine idle

    Jan 26, 2011 | Mazda MPV Cars & Trucks

    1 Answer

    Map sensor bad and can't find one

    A manifold absolute pressure sensor (MAP) is one of the sensors used in an internal combustion engine's electronic control system. Engines that use a MAP sensor are typically fuel injected. The manifold absolute pressure sensor provides instantaneous manifold pressure information to the engine's electronic control unit (ECU). This is necessary to calculate air density and determine the engine's air mass flow rate, which in turn is used to calculate the appropriate fuel flow. (See stoichiometry.)
    An engine control system that uses manifold absolute pressure to calculate air mass uses the speed-density method. Engine speed (RPM) and air temperature are also necessary to complete the speed-density calculation. Not all fuel-injected engines use a MAP sensor to infer mass air flow; some use a MAF (mass air flow) sensor. Several makes use the MAP sensor in OBD II applications to test the EGR valve for functionality. Most notably General Motors uses this approach.

    Find one HERE at eBay and have it in 2 days or so...

    Jan 09, 2009 | 2003 Dodge Stratus

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