A four-wire Mass air flow sensor has two separate grounds. AIR FUEL RATE TOO LOW. A bad mass air flow sensor is often the likely culprit if your car isn't running as it should. These are the most common fault codes for malfunctioning MAF: P0101 - Mass or Air Flow Volume Sensor Circuit Range/Performance P010162 P0101-62 - Mass Air Flow Sensor 1 has a malfunction the signal comparision is faulty P0100 - Mass Air Flow MAF sensor Circuit Malfunction P0102 - Mass Air flow MAF Circuit Low Voltage Input signal P0101 is a diagnostic trouble code (DTC) for "Mass Airflow (MAF) Circuit Operating Range or Performance Problem". Mercedes S600 mass air flow wires problem. $102.09. Last. Pick Up In-Store. Perfect solution to keep your air intake system performing the way it was designed to Crafted from the highest grade materials for dependable, long-lasting service. There can be many causes for this, but a likely culprit is the MAF sensor. 0. The MAF (Mass Air Flow) sensor failing can cause insufficient power and lack of acceleration. MAF sensor is a rigid plastic tube in the air induction pipework with a connector on it. Affiliate link to discounted Mass Air Flow Sensor: http://amzn.to/2jvnknBThis video is about Mercedes mass air flow sensor diagnostics on ML, E class series. Check the hose clips for tightness and inspect the trunking for any cracks or splits and also all the vacuum system, the small bore pipes and fittings for cracks and missing parts. . Slow Acceleration. Rpm is limited to 2500 - 2900 rpm but when changed changes the performance dramatically ! To achieve this, work delicately, but you will just have to disassemble it on both sides of the air duct and disconnect the electrical plug on top of it. The other codes we should address, are those related to the sensors located after the catalytic converter. 3. :grin: OBD-II Code P0101 is defined as a Mass Air Flow Sensor Circuit/Performance Malfunction . It'll eat up more fuel and you'll have to spend a lot more than what you used to spend. If the mass air flow sensor has failed or needs to be cleaned, this can cause especially rich or lean fuel mixtures. They do not exist on a 2002 sprinter with a 611 engine. Some harnesses have more than 400' of wires to replace. The purpose of this cleaning will be to take out all its impure substances to allow it to work efficiently again. Beck Arnley Mass Air Flow Sensor. The code is also unlikely a PCM problem. 16 Posts . The mass air flow (MAF) sensor, part of your vehicle's electronic fuel injection system, is responsible for calculating the total amount of air entering the engine.A contaminated or failed mass air flow sensor cannot measure the amount of air flow correctly. However, a Mercedes Benz may also give a variety of red flags to look for, like improper throttle response. Brand: SKP. After getting leads changed, the codes still remained. Since the mass airflow sensor is essential to standard operating of your engine, any problems or failure of this component will lead to difficulty in starting the engine. Ideally, the air-fuel ratio is 14.7:1, though this can vary depending on engine speed (RPM), engine load, coolant temperature, intake air temperature, and intake air mass. The MAF Signal Wire goes to the car ECU. The ECU uses this information to calculate engine load, which the ECU uses along with information provided by the oxygen sensor (s) to precisely control the engine's air / fuel ratio. To do this, you need to open your Mercedes' air box. Mass Air Flow Sensor by SKP. The mass airflow sensor (MAF) measures the amount of air entering the engine. Most auto repair shops charge between $75 and $150 per hour. Feb 5, 2012 hi ive changed mass air flow sensor five times but its coming back the problem b2/5 hot film mass air flow sensor check wirirng of signal line and voltage but mercedes have checked the cables and they say its not the problem they dont know what the problem is isstay Banned 2006 E320 CDI Joined Mar 17, 2009 A 4-wire mass air flow sensor has a 12-volt positive power source, which is connected to the fuse box's fuse and relay. The cost to diagnose the P0102 Mercedes-Benz code is 1.0 hour of labor. This P0100 diagnostic trouble code (DTC) means that there is a detected problem with the Mass Air Flow (MAF) sensor or circuit. The main symptoms of a bad or failing MAF sensor include: Check Engine Light Illuminates. . Rough Idling Smooth idle is only possible with the right quantity of fuel. The mass air flow sensor measures the air mass flowing into the engine intake. Year: 2015. Discussion . When you remove the sensor, you must make sure to avoid touching the wires. A car's Volkswagen Air Mass Sensor controls the air which is injected into the engine. Engine hesitates when you accelerate Poor throttle response Engine hiccups Engine displays unusually lean or rich idling Sometimes cleaning the sensor could help but we would recommend replacing it. This is because the air-to-fuel mixture in your Mercedes engine is misaligned, resulting in poor operating conditions that are keenly noticeable when idling. # sp189677. Wire harness and mass air flow sensors are well known to fail in all w202 body style mercedes maf are not a larger problem due to their low repair cost on the other hand all w202 have to have the wire harness replaced in under 10 years which for $2000+ is unreasonable due to the fact that it is a clear problem in all such vehicles. Let soak the lower section of your mass air flow sensor (not the plug part) in acetone or another solvent for a few minutes , which will take out most of the grime . It is installed between the air filter and the intake manifold of the engine. You may also notice you're filling up at the gas station more than usual. This will require the use of a flat head screwdriver. When a vehicle's mass airflow sensor is faulty or defective it can cause a variety of problems, and usually results . Mass Air Flow Sensor Failure Causing Poor Fuel Economy and Check Engine Light on : Mercedes-Benz SLK230 Exhaust and Emissions 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. Get it Wed, Sep 14 - Fri, Sep 16. You'll notice if the tailpipes eject black smoke or when the engine runs rough or backfires. Don't spend any money before letting a competent individual with star point you in the right direction, 2. 3. Symptoms, Causes, Symptoms of a Faulty Mass Air Flow Sensor A faulty mass airflow sensor will cause problems similar to low compression or low vacuum, and will also show symptoms similar to when your. The most recently reported issues are listed below. The MAF is unable to accurately calculate the appropriate amount of fuel to be injected into the engine and so unable to aid it in ignition. The mass air flow sensor measures the amount of air entering the engine or the air flow. Reset code and drive vehicle. Exhaust leaks, before the sensor will cause erratic readings; Sensor Monitors. The mass air flow (MAF) sensor measures the mass flow rate of air entering the engine. You should trace the wiring to the MAF and see if another power source is interfering with the MAF's signal. The mass air flow sensor on the W210 is notorious for failing. 2. If the code comes back, it may be necessary to replace the mass air flow sensor. Acceleration Trouble One of the dirty MAF sensor symptoms occur with accelerating especially when onto the highway. . $43.99 $ 43. Clean / Replace Mass Air Flow sensor. #17. Due to the poor air-to-fuel mixture, you are likely to experience frequent lean misfires and dangerous stalling. The cause can be some sort of wiring issue. Though these may . Note: Some MAF sensors also incorporate an air temperature sensor, which is . The powertrain control module (PCM) uses that reading along with other sensor parameters to ensure proper fuel delivery at any given time for optimum power and fuel efficiency. Most wiring harnesses are no longer available nowadays. 1 Mass Air Flow Sensor problem of the 1995 Mercedes Benz E320, Failure Date: 06/14/2012, The car began to idle rough months before, it completely stopped. 3. Some of the most common symptoms of a bad Mass Air Flow sensor in Mercedes Benz cars are: Engine dies, stalls soon after you start it. Meets or exceeds OEM specifications. Terrible Fuel Economy Mercedes Sprinter Mass Air Flow Sensors & Components. Good used harnesses are very difficult to find for many models. Oil from the oversaturated air filter migrates to the MAF sensor, where it coats the probe. | Code P0100 Mercedes-Benz Tech Notes, Before replacing the mass air flow sensor, try replacing the air filter and cleaning the Mass Air Flow (MAF) sensor with low compress air or mass air flow sensor cleaner. . It's another common symptom of bad mass airflow sensor and it happens when the wire is deformed or there is a damage to the device's electrical components. This issue is usually most noticeable . Mercedes. The signal wire means the MAF sensor sends the signal (Output Voltage) to the ECU. 6. Check oil level using the engine oil dipstick, under hood.. Never just add oil without knowing how much is in engine already. Mercedes-Benz ML500 Mass Air Flow Sensor May Fail - 9 reports. How the MAF sensor works, 2. Mass Air Flow Sensor. There is no solution for a damaged sensor but to replace it. In modern cars, an intake air temperature or IAT . Just installed a new Mass air flow sensor on my Mercedes 2001 e 320.It Stalls out after a minute or two and will not restart.I hear you have to clear the old codes off so the sensor can read the new good ones by disconnecting the battery cables for 10 minutes to reset the system . Got a recurring fault code (see attached) that causes the engine malfunction lamp to active (No limp mode). For those who suspect MAF sensor failure. You can hardly diagnose a MAF sensor on symptoms alone. The MAF sensor sends inaccurate information to the PCM, much like running rich. Make sure to disconnect the negative (black) terminal first. Mass Air Flow (MAF) Circuit Range/Performance Problem Its quite possible that the leak in the intercooler pipe is throwing up this fault. . As its a mechanical fault it tends not to turn on the fault light and you can sometimes hear a 'hissing' noise with the engine running. A high frequency or high voltage MAF sensor signal, unlike related code P0102, does not indicate a dirty MAF.