A faulty maf sensor can cause your vehicle to run too rich or run too lean. Most cars mafs can be found behind the air filter on the air intake. The audi a4 line is a collection of compact cars designed to. Sep 20, 2018 a clean maf sensor can restore 410 horsepower to the wheels, which is a significant number for just cleaning a sensor. Changing the mass airflow sensor on an audi is very easy and takes less than 30 minutes, even for beginners. It will be a circular object inline between the air filter and the throttle body with an electrical connection. Quickly replace the g89 outside air temperature sensor in your audi b5 s4a4. Audi vw intake air temperature sensor 058905379 bosch. How to clean your maf sensor in vehicles it still runs. Audi mass air flow maf sensor symptoms replacement. How to clean a mass airflow sensor indepth, detailed. How to clean your maf sensor in vehicles by contributing writer updated june 12.
The most common way to test the 5 wire vw mass air flow maf sensor is just to unplug it with the engine running. Buy bosch automotive 281002757 original equipment mass air flow maf sensor. Audi a4 mass air flow sensor requires no regular maintenance. Even if cleaning the sensor doesnt solve all your check engine light problems it might not be a waste of time. Maf expected in vcds and found she also needed a new air flow sensor. The symptoms of a bad mass air flow sensor autozone. I figured it was time to clean it so i did so last month. Save money by avoiding your mechanic and perform the repairs using the information weve provided here. Mass air flow sensor maf for audi a4 tt vw golf jetta 1. Before you remove the sensor, use a camera to record the sensor setup and connections for reference later. Often mass air flow sensor readings are measured at idle, 1,000 rpm, 2,000. Some turbocharged engines use both maf and map sensors. Either way, check your repair manual for the wiring diagram and specific voltage readings. A vehicles mass airflow sensor, or maf, is the component that measures the flow and density of the air flowing into the combustion chamber.
This problem seems to have become more widespread with the release of the mk. Audi dealers carry stocks of cleaning products which have been tested for use on your vehicle and are not harmful. Audi tpi 2033001 pertains to p0491 and p0492 stored at same time on the following. Map sensor cleaning may be necessary to correct poor fuel.
These particles can be removed with automotive solvents that are safe for the use on mass air flow sensors. Jan 26, 2019 how to clean or replace the maf sensor for vw or audi. Replacing the maf sensor is the only solution to this complication. Some mechanics will recommend to clean the sensor every time you replace the air filter. A surge in audi b6 maf sales leads to inventory clearouts nationwide due to. If the code comes back, it may be necessary to replaced the mass air flow sensor. Audi a4 b6 maf sensor replacement 20022008 pelican.
Be sure to consult your owners manual, a repair guide, an autozoner at a store near. Carefully remove the sensor from the air duct and disconnect the electrical connector. Wiring andor connectors fromto mass air flow sensor mafg70 faulty. Its a critical engine performance component, so if it fails or begins to. Part 1 vw mass air flow maf sensor test 5 wire type.
Here is a quick video on how to clean or replace a maf mass air flow sensor on an audi or vw 2. Jun 03, 20 this is a very short tutorial on how to locate and then take out the maf sensor for audi a4 tdi b6 model mass air flow sensor once you find the maf sensor, its pretty much easy to replace i. Quickly replace the g89 outside air temperature sensor in. Diy instructions for cleaning or replacing the maf mass airflow sensor in a vw jetta, golf, gti, passat, new beetle, a4.
Audi mass air flow maf sensor symptoms replacement guide. Move the bag around to get the alcohol to clean the sensor and then take the sensor out and let it dry fully before you reinstall it into the maf housing. It helps the cars computer regulate the ratio of air to fuel. Aug 24, 2015 if the outside temperature displayed on the dis on your console doesnt match reality or your hvac blows hot air when you asked for cold or visa versa, the g89 outside air temperature sensor on your b5 audi may have gone bad. Audi 100 90 a4 a6 quattro cabriolet mass air flow sensor hitachi 0783471a. Regular maf sensor maintenance includes cleaning the sensor when the vehicles begins to idle roughly or consume more gas. Often, the problems associated with the mass air flow sensor occur due to dirt and debris buildup. This video is also good for audi and vw owners who want to know how to replace and install a maf sensor. How to clean your maf sensor in subaru outback pop the hood and locate the maf sensor on the intake tube. Compact, sleek and powerful, your audi a4 is the kind of executive sedan that continues to turn heads. The mass air flow sensor senses the total amount of air passing the sensor and allows the fuel injection system to adjust the fuel mixture to compensate for cold weather andor high altitude conditions. One of the most common failures on 2000 and newer vw and audi cars is the maf sensor, but properly diagnosing.
My old b5 audi a4 once needed the upstream precat oxygen sensors replaced, both of which being accessible from under the hood. Take the sensor off the housing and put it in a ziplock bag with some 91% rubbing alcohol. The benefits of cleaning your mass air flow sensor. Audi tpi 2033001 pertains to p0491 and p0492 stored at same time on the following vehicles with more than 15,000 miles. Throttle position sensor fits 19922000 audi cabriolet a6,a6 quattro s4 standar fits. You can use the service manual to be sure of the location, or use the internet for a quick search. Iv platform, which is apparently due to a bad batch of sensors from the bosch factory. Mass air flow free delivery possible on eligible purchases. Bosch automotive 281002757 original equipment mass air flow.
The hot wire or film element is dirty or damaged so that it is unable to feel air flow. Mass air flow sensor maf cleaning the family handyman. Most of the time, you or a mechanic can fix the problem by cleaning the maf. Faersi mass air flow sensor meter maf sensor 0280218063 06a906461l for audi a4 tt vw golf jetta beetle passat 1. A contaminated or bad air flow sensor will, in most cases, show lower air flow readings than a known good one.
Audi dealers carry stocks of cleaning products which have been tested for use on your vehicle and are not harmful to the waxing and polishing environment. As a result, the engine either halts or idles roughly. Use an electric parts cleaner on a soft rag or paper towel to clean the outside of the map sensor. P0102 audi mass or volume air flow circuit low input. While plugged in, there is erratic nondetectable voltage, onoff, onoff. Apr 05, 2016 this article applies to the audi a6, a4, a3 and q5q7 20042010. In some rare cases a bad sensor may show higher readings. Check wiring andor connectors fromto mass air flow sensor mafg70 checkreplace mass air flow sensor mafg70 special notes. Also please check out the statistics and reliability analysis of audi a4 based on all problems reported for the a4.
Audi a4 b6 maf sensor replacement 20022008 pelican parts. For over a century, stuttgart germany based robert bosch, gmbh has been an international powerhouse, constantly pushing the envelope in automotive system design as well as manufacturing process development. Its a critical engine performance component, so if it fails or begins to fail, you should have it replaced immediately. You can make your car powerful, fuel saving or both. Great savings free delivery collection on many items. Of course, different engines will have different readings. On mass air flow sensors with a sense wire, this wire can become contaminated with dust particles. Or even in the hot summer, where it seems like your vents have small volcanoes in them.
Audi technical articles welcome to our audi technical articles section. The mass air flow sensor maf is used to measure the amount and temperature of air that is entering the engine at any one time. Im reading a little over 320gs on my b6 s4 maf now. In that case, the cars computer cannot control the fueltoair ratio because the sensor does not send any information to it. In this guide, you will find stepbystep instructions on how to change audi mass air flow maf sensor.
A mass air flow sensor maf is one of the key components of an. Yeah, even many books are offered, this book can steal the reader heart consequently much. A clean maf sensor can restore 410 horsepower to the wheels, which is a significant number for just cleaning a sensor. Just to update on removing the sensor, on my audi a4 b5, the sensor had 2 6 point security screws. The mass air flow sensor is prone to failure due to age or other factors affecting. It really is a bother when the temperature drops and you turn your heater on, only for it to spew out the cold winter breeze. Spray the mass air flow sensor cleaner along the inside of the sensor. And with production numbers peaking at more than 300. Mass airflow sensor cleaning can increase fuel economy, stop hesitation and stalling, and shut off your check engine light. New mass air flow sensor maf for audi a4 tt vw golf jetta 1. Keeping the sensor clean will help the vehicles run efficiently. What isnt attractive is a struggling a4 that needs its air flow sensor replaced.
Replacement audi a4 mass air flow sensors available at carid, can help you control and follow the changes in the fuel mixture. The sensor self cleaning electrical circuit on hotwire types has failed. Cleaning may correct faulty mass air flow sensor problem description the mass air flow sensor on higher mileage cars occasionally needs to be cleaned or replaced if sluggish acceleration is experienced or the check engine light is illuminated with a mass air flow meter sensor fault code stored. Soaked the turbo in oven cleaner and actuated the lever manually to free it up, and replaced vacuum hoses in the summer.
Another way to diagnose the failing mass air flow sensor is to try to clean it. I tried cleaning my maf sensor in my 2000 vw passat as well as taking out the entire air box and the hoses to clean out all the dirt and sand. If the maf is bad either because its not producing a signal or producing an erratic one, the cars idle will return to normal and the car will seem to run fine. How to troubleshoot a mass airflow sensor in a few simple steps. Do not use maf sensor cleaners on karmanvortex style air flow sensors, which are found in toyota supra turbos, mitsubishi, and most lexus engines. With millions of units sold around the world, there is definitely no doubt that the audi a4 sealed the deal in putting audi on the map as one of the worlds top luxury car manufacturers. P0102 audi tech notes before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Important cookie information this website uses cookies for reasons of functionality, comfort, and statistics. How to clean or replace the maf sensor for vw or audi axleaddict. Audi a4 a4 quattro 2000, black mass air flow sensor by spectra premium. Bosch mass airflow sensors are engineered and tested to oe specifications and developed in conjunction with the vehicle manufacturers. What is mass air flow sensor in a car, problems, symptoms, mass air flow sensor. With five generations behind it, filled with constant development and technical innovations, audi a4 is one of the most prominent cars in its class. This item bosch 63123 air mass sensor bosch 0280218063 original equipment mass air flow maf sensor faersi mass air flow sensor meter maf sensor 0280218063 06a906461l for audi a4 tt vw golf jetta beetle passat 1.
Opinions vary on how often you should clean the mass airflow sensor. Audi a4 mass air flow sensors are commonly misdiagnosed. Weve gathered a vast collection of useful articles to help you repair many items on your audi. The maf also incorporates an internal intake air temperature sensor, which measures the temperature of the intake air. The most recently reported issues are listed below. Often mass air flow sensor readings are measured at idle, 1,000 rpm, 2,000 rpm and 3,000 rpm. To confirm that your sensor has failed, you can scan for codes or use the diagnostic mode built into your hvac unit. Mass airflow sensor failure symptoms it still runs. Shouldnt the mass air flow sensor dictate the voltage going out to the ecm. After cleaning the maf sensor the car was noticeably more responsive and much more smooth. Audi a4 owners have reported 1 problem related to mass air flow sensor under the electrical system category.
This is a very short tutorial on how to locate and then take out the maf sensor for audi a4 tdi b6 model mass air flow sensor once you find the maf sensor, its pretty much easy to replace i. This particle accumulation over time results in poor performance of the sensor. How to clean and replace a maf sensor audi vw passat a4 a6 2. The sensor selfcleaning electrical circuit on hotwire types has failed. Symptoms this is what you may notice if your audi maf sensor is bad or dirty. With the mass air flow cleaner and tools in hand, locate the maf sensor in the air duct between the air filter box and the throttle body. Now, you could go bythebook and do as the bentley manual instructs remove the dash, fan, etc, etc. Bosch automotive 281002757 original equipment mass air. Spectra premiums complete line of new mass air flow sensors, featuring ceramic pc boards to ensure premium performance and durability. The easy fix is to have the sensor cleaned by a technician. Mar 22, 2010 the most common way to test the 5 wire vw mass air flow maf sensor is just to unplug it with the engine running.
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