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I HAVE HYUNDAI CAR 2002 SHOW HTIS CODE P0106 AND P0172. WHAT IS THE DEFFRENCE BETEEW MAP/BARO, VAF/MAF.

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  • Cars & Trucks Master
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MAP = mass air pressure, Baro is atmospheric air pressure ( as in barometer), VAF = volume air flow and MAF = mass air flow . The baro sensor alters the air fuel mixture for varying altitudes that the vehicle can travel through. IE from flat plains at sea level to over the rockis.. The VAF sensor measures the volume of air passing through the air intake . The MAF measures the combination of volume and the density of the air flowing through the air intake to adjust the air fuel mixture as cold air is more dense and requires more fuel to burn completely. The MAP measures the vacuum in the manifold after the throttle control to adjust the air fuel mixture in over run situations so that the car will not backfire. All these sensors continually supply input to the ECM which continually compares them with the O sensors and adjusts the injector pulse to ensure complete burn of the mixture in all situations and engine rpm's.

Posted on May 13, 2014

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Posted on Jan 02, 2017

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SOURCE: what is vaf

The VAF is the vane airflow,also know as an IAC

Posted on Sep 30, 2008

  • 6982 Answers

SOURCE: Loosing power after replaced coil housing and wires

Possible the coil code is a "leftover" if you did not clear the codes after changing what you did. You can clean the internal wires on the air flow sensor with a Q-tip and some carb cleaner. the map sensor can be tested by following instructions in either haynes or chilton manual. Don't replace anything till you do testing. And of course, check the vacuum lines for damage...any cracked or disconnected will cause whatever they are attached to, to not work.

Posted on Sep 03, 2009

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SOURCE: p0106 map sensor code on tdi

02 jetta map sensor code p0106 and faulty boost sensor code p0238

Posted on Oct 12, 2009

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SOURCE: car wont start, got code p0172, got fuel, spark

PCM detect an excessively rich condition

Posted on Jan 22, 2010

  • 29 Answers

SOURCE: 92 corolla with VAF code 31 acts like MAF sensor

Your corolla doesn't use a MAF sensor, it uses a MAP sensor

The map sensor is located on the Intake Manifold right by the throttle body. That could easily be causing the issue you're stating.

Posted on Mar 01, 2011

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I am getting three different codes on my 2001 Mercedes ml320. p0103, p0106, and p0453.


code p 0103 refers to mass air flow(MAF) sensor/ volume air flow(VAF) sensor --high input===causes ---short to positive---maf/vaf sensor/s---ECM
code p 0106 refers to manifold absolute pressure(MAP) sensor/barometric pressure(BARO) sensor---range /performance problem===causes ---intake /exhaust leak--map sensor---baro sensor
a leak here could be the hose to the cabin to control the vent operation, transmission actuator hose leak and the exhaust leak could be a cracked flex section of the exhaust pipe near the manifold
code p 0453 refers to evaporative emission(EVAP) pressure pressure sensor---high output===causes --wiring short to positive --EVAP pressure sensor---ECM
I would fix the EVAP symptoms first as as it will show as some of the problems you have mentioned

Feb 04, 2017 | Mercedes-Benz Cars & Trucks

1 Answer

What is a code po106 on a 2004 lincoln ls


code p0106 refers to manifold absolute pressure (MAP) sensor /barometric pressure (BARO) sensor ---range /performance problem===causes --intake /exhaust leak--wiring--MAP sensor ---Baro sensor.

check for vacuum / air leaks and /or change sensors.

Aug 17, 2014 | 2004 Lincoln LS

1 Answer

Hello, i have an hyundai car XG3000 that detected code p0172 and p0106.


Possible causes
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Faulty Mass Air Flow (MAF) sensor

P0106 is for the Mass Airflow Sensor, so I'd look at the MAF as your failure. Only fix is to double check the wiring and if that is ok, replace the sensor.


Read more: http://engine-codes.com/p0172_hyundai.html#ixzz33nEtGOJP

May 11, 2014 | Cars & Trucks

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

1 Answer

How to fix fault code p0238 on a 2004 vw passat


P0106 = Map sensor, it is out of range.
P0172 = Fuel Trim it is too rich



Go check out http://volkswagen-polo-highline.blogspot.com

Feb 11, 2013 | 2008 Volkswagen Passat Sedan

2 Answers

What is p0106?


Hi there:
This is a MAP sensor code (manifold absolute pressure). the code is for performance. you need to check the sensor and make sure its pluged in, and that the vacuum hose going to the sensor is also connected and not pinched or restricted.


DTC P0106 - MAP/Barometric Pressure Circuit Range/Performance Problem
The Powertrain Control Module (PCM) uses the Manifold Absolute Pressure Sensor (MAP) to monitor engine load. (NOTE: Some vehicles have a Barometric Pressure (BARO) sensor that is integral to the Mass Air Flow (MAF) sensor and do not have a MAP sensor. Other vehicles have a MAF/BARO and a redundant MAP sensor where the MAP sensor functions as a backup input in case of MAF failure.) The PCM supplies a 5 Volt reference signal to the MAP sensor. Usually the PCM also supplies a ground circuit to the MAP sensor as well. As the manifold pressure changes with load, the MAP sensor input informs the PCM. At idle the voltage should be 1 to 1.5 Volts and approximately 4.5 Volts at Wide Open Throttle (WOT). The PCM looks for any change in manifold pressure to be preceded by a change in engine load in the form of changes in throttle angle, engine speed, or Exhaust Gas Recirculation (EGR) flow. If the PCM doesn't see any of these factors change while detecting a rapid change in MAP value, it will set a P0106.

The following could be symptomatic of a P0106:Engine runs roughBlack smoke at tailpipeEngine will not idlePoor fuel economyEngine misses at speed

A P0106 could be caused by:Bad MAP sensorWater/dirt intrusion affecting MAP sensor connectorIntermittent open in the reference, ground, or signal wire for the MAP sensorIntermittent short in the reference, ground, or signal wire for the MAP sensorGround problem due to corrosion causing intermittent signal problemA break in the flexible air intake duct between the MAF and the intake manifoldBad PCM (do not assume the PCM is bad until you've exhausted all other possibilities)

Possible Solutions:Using a scan tool, watch the MAP sensor value with the key on, engine off. Compare the BARO reading with the MAP reading. They should be roughly equal. The voltage for the MAP sensor should read approx. 4.5 volts. Now start the engine and look for a significant drop in the MAP sensor voltage indicating the MAP sensor is working.

If the MAP reading doesn't change perform the following:
With the Key on, engine off, disconnect the vacuum hose from the MAP sensor. Using a vacuum pump, pull 20 in. of vacuum on the MAP sensor. Does the voltage drop? It should. If it doesn't inspect the MAP sensor vacuum port and vacuum hose to manifold for a restriction of some kind. Repair or replace as necessary.
If there are no restrictions, and the value doesn't change with vacuum, then perform the following: with the Key on and engine off and the MAP sensor unplugged, check for 5 Volts at the reference wire to the MAP sensor connector with a Digital Voltmeter. If there is none, check for reference voltage at the PCM connector. If the reference voltage is present at the PCM connector but not the MAP connector, check for open or short in the reference wire between MAP and PCM and retest.If reference voltage is present, then check for existing ground at the MAP sensor connector. If it isn't present then repair open/short in the ground circuit.If ground is present, then replace MAP sensor.
Other MAP sensor trouble codes include P0105, P0107, P0108 and P0109.


Hope this helps.

Mar 30, 2012 | 2001 Cadillac Sts

2 Answers

PO106 code GM what is that


P0106 - MAP/Barometric Pressure Circuit Range/Performance Problem

The Powertrain Control Module (PCM) uses the Manifold Absolute Pressure Sensor (MAP) to monitor engine load. (NOTE: Some vehicles have a Barometric Pressure (BARO) sensor that is integral to the Mass Air Flow (MAF) sensor and do not have a MAP sensor. Other vehicles have a MAF/BARO and a redundant MAP sensor where the MAP sensor functions as a backup input in case of MAF failure.) The PCM supplies a 5 Volt reference signal to the MAP sensor. Usually the PCM also supplies a ground circuit to the MAP sensor as well. As the manifold pressure changes with load, the MAP sensor input informs the PCM. At idle the voltage should be 1 to 1.5 Volts and approximately 4.5 Volts at Wide Open Throttle (WOT). The PCM looks for any change in manifold pressure to be preceded by a change in engine load in the form of changes in throttle angle, engine speed, or Exhaust Gas Recirculation (EGR) flow. If the PCM doesn't see any of these factors change while detecting a rapid change in MAP value, it will set a P0106.

Potential Symptoms: The following could be symptomatic of a P0106:
* Engine runs rough
* Black smoke at tailpipe
* Engine will not idle
* Poor fuel economy
* Engine misses at speed

Causes: A P0106 could be caused by:
* Bad MAP sensor
* Water/dirt intrusion affecting MAP sensor connector
* Intermittent open in the reference, ground, or signal wire for the MAP sensor
* Intermittent short in the reference, ground, or signal wire for the MAP sensor
* Ground problem due to corrosion causing intermittent signal problem
* A break in the flexible air intake duct between the MAF and the intake manifold
* Bad PCM (do not assume the PCM is bad until you've exhausted all other possibilities)

Possible Solutions: Using a scan tool, watch the MAP sensor value with the key on, engine off. Compare the BARO reading with the MAP reading. They should be roughly equal. The voltage for the MAP sensor should read approx. 4.5 volts. Now start the engine and look for a significant drop in the MAP sensor voltage indicating the MAP sensor is working.

If the MAP reading doesn't change perform the following:
1. With the Key on, engine off, disconnect the vacuum hose from the MAP sensor. Using a vacuum pump, pull 20 in. of vacuum on the MAP sensor. Does the voltage drop? It should. If it doesn't inspect the MAP sensor vacuum port and vacuum hose to manifold for a restriction of some kind. Repair or replace as necessary.
2. If there are no restrictions, and the value doesn't change with vacuum, then perform the following: with the Key on and engine off and the MAP sensor unplugged, check for 5 Volts at the reference wire to the MAP sensor connector with a Digital Voltmeter. If there is none, check for reference voltage at the PCM connector. If the reference voltage is present at the PCM connector but not the MAP connector, check for open or short in the reference wire between MAP and PCM and retest.
3. If reference voltage is present, then check for existing ground at the MAP sensor connector. If it isn't present then repair open/short in the ground circuit.
4. If ground is present, then replace MAP sensor.

Other MAP sensor trouble codes include P0105, P0106, P0107, P0108 and P0109.

I hope this helps to solve it (remember to rate this answer).

Oct 28, 2010 | 2003 GMC Envoy Xl

1 Answer

Loosing power after replaced coil housing and wires


Possible the coil code is a "leftover" if you did not clear the codes after changing what you did. You can clean the internal wires on the air flow sensor with a Q-tip and some carb cleaner. the map sensor can be tested by following instructions in either haynes or chilton manual. Don't replace anything till you do testing. And of course, check the vacuum lines for damage...any cracked or disconnected will cause whatever they are attached to, to not work.

Sep 01, 2009 | 2001 Pontiac Grand Am SE

1 Answer

Car turns over but wont fire


you will have to replace the map sensor that is most likely the problem but im not sure what the circut low input is i need more details

Nov 12, 2008 | 1996 Pontiac Grand Am

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