YUNIER LOPEZ MAF SENSOR IS LOCATE IT IN FRONT OF THE AIR FILTER. (SVT LIGHTING)

Intake Air Temperature (IAT) sensor and Manifold Absolute Pressure (MAP) sensor are combined into a single assembly which is called Mass Air Flow (MAF) sensor. This MAF sensor is located on the air filter box near air filter hose, and is connected with a five wire connector. You cannot replace the IAT sensor alone. Instead a MAF sensor is replaced altogether.






Thank you for visiting Fixya.

This is the Mass Air Flow Sensor. It's a screen-like device located on the air intake line to the throttle body. It measures the flow rate and density of air entering the engine. The code can mean a few possible things:

1. Dirty Air filter
2. Dirty MAF Sensor
3. MAF Sensor wiring problems

Try replacing the air filter first. Remember that engine codes must be reset or they will remain in the computer even after repairs. If that doesn't work you can remove the MAF and clean it with a MAF Sensor approved spray cleaner. If you use the wrong cleaner you will destroy the MAF. If cleaning the MAF don't work, then replacement is indicated.

How old is the air filter? Replace if dirty. Did you adjust spark plugs to correct gap when installed?

Check sensors, particually maf sensor, may need replacing or cleaning. Maf sensor is located on the intake pipe from the air filter. Can buy the cleaner on eBay, 'maf cleaner'. The maf sensor measures air flow telling the injection how much fuel to use.

Also if there is a crank or flywheel sensor, check it's ok.

Hello ..There is a tube the your air filter connects to, and there is a ring(MAF) that couples into the air inlet tube right around where it passes the front of your engine. There will be a small electrical connection that will identify the location if you follow the tube coming from your air filter housing.

The MAF Sensor (Mass Air Flow) is located in the air induction system between the air filter and the throttle body.

Be certain to inspect very well for any air or vacuum leaks in the air induction system or for any loose hose clamps or fasteners in the air induction system, especially between the MAF Sensor and the throttle body. There can be no un-metered air entering the engine or the engine performance will be effected and the check engine light, or MIL (Malfunction Indicator Light) will come on, and P0170 is only one DTC (Data Trouble Code) that un-metered air can cause.

Also, be certain to check for any obstuctions on the air velocity grid to the MAF Sensor, or in the air flow to the MAF Sensor such as a plugged up air filter, or something sucked up into the air intake for the air cleaner assembly.

The MAF Sensor can be removed from the MAF housing and cleaned using carburetor cleaner in a spray can to clean off the fine dust that often builds up on the air velocity sensor part of the MAF Sensor and causes poor performance from the MAF Sensor. (it will require a tamper resistant torx bit, and note the position that the MAF Sensor is positioned in the MAF housing so that it is installed back into the MAF housing properly)

Then clean off the MAF Sensor with the carburetor spray. (From a spray can only, and do not submerge the MAF sensor in any type of water, cleaner, or solvent, or the MAF Sensor will be damaged)

If cleaning the MAF Sensor does not solve the problem, then replace the MAF Sensor and be sure to install it with the air velocity grid facing the air filter, and be sure to tighten all the hose clamps or fasteners well.

Here are a few links to MAF Sensors for that vehicle, and an image to help assist you.



Replacement MAF- $23.27
http://www.familycar.com/store/item/Mercedes-Benz_C230_Replacement_Mass-Air-Flow-Sensor_1997_2000_RBM316703.html


Bosch MAF- $134.95
http://www.familycar.com/store/item/Mercedes-Benz_C230_Bosch_Mass-Air-Flow-Sensor_1997_2000_W0133-1599901.html


Beck Arnley MAF- $295.60
http://www.familycar.com/store/item/Mercedes-Benz_C230_Beck-Arnley_Mass-Air-Flow-Sensor_1997_2000_157-0367.html

P0102 - Mass Air Flow (MAF) Circuit Low Input
The MAF sensor circuit is monitored by the PCM for low air flow (or voltage) input through the comprehensive component monitor (CCM). If during key ON engine running the air flow (or voltage) changes below a minimum calibrated limit, the test fails. MAF sensor disconnected
MAF circuit open to PCM
VPWR open to MAF sensor
PWR GND open to MAF sensor
MAF RTN circuit open to PCM
MAF circuit shorted to GND
Intake air leak (near MAF sensor)
A closed throttle indication [throttle position (TP) sensor system]
Damaged MAF sensor
Damaged PCM
A MAF V PID (MAF PID) reading less than 0.23 volts (Refer to equivalent grams/second chart in GO to Pinpoint Test DC ) in continuous memory or key ON and engine running indicates a hard fault.
P0113 - Intake Air Temperature (IAT) Circuit High Input Indicates the sensor signal is greater than Self-Test maximum. The IAT sensor maximum is 4.6 volts or -50°C (-58°F). Open circuit in harness
Sensor signal short to power
Damaged sensor
Improper harness connection
Damaged PCM
IAT V PID reading greater than 4.6 volts with key ON and engine OFF or during any engine operating mode indicates a hard fault.

Your vehicle dose not have a maf sensor. They used a map sensor it is on the engine located under the front of the breater where it attaches to the engine.

the maf is located on a black plastic pipe 50mmdia beside the air filter (the air filter is located in a black plastic box 300mmx150mm approx)the maf is held in with two screws

If your car has a MAF (Mass Air Flow) sensor, it would be located in the air delivery tube that runs from the air filter box to the throttle plate assembly on the intake manifold. It will have a wiring connector going to it, also. The MAF does exactly what it is called: It "senses" the volume, or "mass" of the air-flow; thusly it needs to be in the intake air tube. If you do NOT have such a device in the air-tube, you have a MAP sensor, (Manifold Absolute Pressure); this is another way of measuring the same air volume, albeit older technology. You will commonly find this device on the firewall, with a vacuum line running to the intake manifold.

I hope that this sheds some light on your question.

Thanks for choosing FixYa for advice!

PO171 means that the MAF (MASS AIRFLOW SENSOR )sensor is dirty or deffective . Or that there is a leak in the vacume hose leading to the MAF sensor.Try cleaning the MAF sensor with brake cleaner .Be careful not to damage it.Check your Air filter also. Make sure it is clean. the reason the MAF sensor gets dirty is because of the filter. Also look for any leaks in the hose or hoses connected to it.It is located near the top of the air filter...little black box with wires coming out toward the front of the car.