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