I can't tell you what it does, but I can tell you it is a pretty easy fix. I believe the part is in the 10-20 dollar range. The sensor is located on the driver's side rear portion of the transmission. Take it out with a 1 inch wrench (some fluid will run out of the hole. I replaced the sensor the first time the check engine light came on, however the sensor is magnetic and collects any ferrous debris in the Transmission Fluid, and simply cleaning it with a rag worked on subsequent occasions.
It does not have a Mass Airflow Sensor.
Nope. Rumor is crankshaft (near the bottom of engine) is only used for diagnostics, now camshaft sensors(s), are needed and are located near the top of the engine.
Could be you need diagnostics reset or catalytic converter on the way out
The sensor is about $75.00 to $100.00 and the labor is 1/2 hour with 1 hour diagnostics. It is best to have the diagnostics done as you may not have a bad oxygen sensor. It could be as simple as a vacuum leak.
Yes
get it checked out by advanced auto parts they run a diagnostics for free just ask its and obd2
Without a signal from the crank sensor, the ECU won't know how fast the engine is turning or "where it is" (which cylinder is about to fire), and the engine will not run. If the sensor is just "somewhat bad" (and gives a weak or irregular signal), the engine might do things like run badly at certain speeds, stop occasionally, or have trouble starting.
Acceleration delay and bad diagnostics are normally good signs. If you do discover that it is the MAF sensor, VW has issued a free replacement under the extended warranty program.
Bring your vehicle to an Auto mechanic for an engine diagnostics test to determine which area of your engine has cause the service engine light to appear illuminated.The results could be as simple as a sensor going out, or component failure which puts you at major risk.
The air charge temperature sensor is located in the air inlet between the air filter and the air horn. The coolant temperatur sensor is located in the intake manifold. I believe that you need to have a Repair Shop scan the engine and do diagnostics on the car before you replace parts that may not be bad. Just because you get a code does not mean that part is bad.
Generally, the onboard diagnostics will tell you when you scan the computer codes.
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