Question about 2000 Volkswagen Passat 4Motion

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My altitude adaptation sensor is out of tolerance. what problems can this cause, and how much does it cost to fix?

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  • ballbag81 May 08, 2009

    had it on the dignostics machine, and this was the fault that it came up with, neither me or the mechanic have heard of it either

  • Jmac427 May 11, 2010

    Never heard of anything like that on a car are u confusing it with something else

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The altitude sensor on a 98 passat is a small black sensor located next to the ecm...here is a link to a website that sells them:

http://www.carpartsdiscount.com/auto/parts/switches_sensors_and_senders/bosch_altitude_sensor.html?3593=52152&utm_source=froogle&utm_medium=cpc&utm_campaign=adv&3593=52152&3671=1002

Hope it helps!

Posted on Jan 27, 2010

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Posted on Jan 02, 2017

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Chrysler pt cruiser code p2096


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What causes and how to fix code PO171. System too lean, bank # 1


Description : The adaptive fuel Strategy continuously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. Now that we have an Idea of what the codes mean , we need to narrow them down. More than likely the problem is causing both codes to set. Keeping this in mind, lets concentrate on Code PO1309. Of the possible causes listed above I see two Sensors that may throw up a lean code. I would look at the MAF Sensor first and then the Temp Sensor. You may find that if you remove the internal Sensor from the MAF Case that some degree has collected on the thin wire. If you find debree, use a Q-Tip to clean it. DO NOT USE CHEMICALS TO CLEAN IT. If no debree is found, try a Known Good MAF Sensor. Still no fix, move on to testing the rest of the Sensors on the list till you find the problem. Keep in mind that the check engine light will have to be cleared after you have fixed the problem.

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Code p0101


P0101 - Mass Air Flow (MAF) Circuit Range/Performance Problem

Basically this means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. The PCM detects that the actual MAF sensor frequency signal is not within a predetermined range of the calculated MAF value for more than 4.0 seconds. Other MAF sensor circuit DTC trouble codes are P0100, P0102, P0103, and P0104.

Symptoms: You will likely not notice any serious drivability problems, although there may be symptoms.

Possible Solutions:
The simplest thing to do is to reset the code and see if it comes back. Then start with the cheapest, easiest repair procedures:
* Inspect for the following conditions:
An incorrectly routed harness--Inspect the harness of the MAF sensor in order to verify that it is not routed too close to the following components:
- The secondary ignition wires or coils
- Any solenoids
- Any relays
- Any motors
* A low minimum air rate through the sensor bore may cause this DTC to set at idle or during deceleration. Inspect for any vacuum leaks downstream of the MAF sensor.
* A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor g/s display on the scan tool to increase rapidly. This increase should be from 6-12 g/s at idle to 230 g/s or more at the time of the 1-2 shift. If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.
* The barometric pressure (BARO) that is used in order to calculate the predicted MAF value is initially based on the MAP sensor at key ON.
* When the engine is running the MAP sensor value is continually updated near WOT. A skewed MAP sensor will cause the calculated MAF value to be inaccurate. The value shown for the MAP sensor display varies with the altitude. With the ignition ON and the engine OFF, 103 kPa is the approximate value near sea level. This value will decrease by approximately 3 kPa for every 305 meters (1,000 feet) of altitude.
* A high resistance on the ground circuit of the MAP sensor can cause this DTC to set.
* Any loss of vacuum to the MAP sensor can cause this DTC to set.

Hope this helps (remember rated this).

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1 Answer

I got a check engine light and now it's gone. Code P0101 What do I need to look at and how?


Mass Air Flow (MAF) Circuit Range/Performance Problem

The simplest thing to do is to reset the code and see if it comes back. Then start with the cheapest, easiest repair procedures:
  • Inspect for the following conditions:
    An incorrectly routed harness--Inspect the harness of the MAF sensor in order to verify that it is not routed too close to the following components:
    - The secondary ignition wires or coils
    - Any solenoids
    - Any relays
    - Any motors
  • A low minimum air rate through the sensor bore may cause this DTC to set at idle or during deceleration. Inspect for any vacuum leaks downstream of the MAF sensor.
  • A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor g/s display on the scan tool to increase rapidly. This increase should be from 6-12 g/s at idle to 230 g/s or more at the time of the 1-2 shift. If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.
  • The barometric pressure (BARO) that is used in order to calculate the predicted MAF value is initially based on the MAP sensor at key ON.
  • When the engine is running the MAP sensor value is continually updated near WOT. A skewed MAP sensor will cause the calculated MAF value to be inaccurate. The value shown for the MAP sensor display varies with the altitude. With the ignition ON and the engine OFF, 103 kPa is the approximate value near sea level. This value will decrease by approximately 3 kPa for every 305 meters (1,000 feet) of altitude.
  • A high resistance on the ground circuit of the MAP sensor can cause this DTC to set.
  • Any loss of vacuum to the MAP sensor can cause this DTC to set.

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1 Answer

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