car diagnostic tool re-installed the sensor's screws

How you can Diagnose a Faulty Mass Air Flow Sensor 1Connect a OBDII-type engine code reader for your auto applying the connection port underneath the steering wheel area. Turn the ignition to the "on" position but usually do not start out the engine. Let the code reader connect with all the auto pc to view if it'll create a code for a faulty mass air flow sensor. Confirm no matter if the sensor is really triggering a malfunction code or not. Erase the code stored within the laptop or computer employing the reader tools. Turn the automobile off and disconnect the code reader.

2Raise the hood and locate the air filter box. Open the air filter box and pull out the old air filter. Use a shop vacuum to suck up all the debris, dust and dirt inside the filter box. Nevertheless car diagnostic tool, usually do not poke the vacuum in to the cavity going towards the mass air flow sensor.3Turn off the vacuum and use a screwdriver to disconnect the hose clamp holding the intake hose towards the bottom in the mass air flow sensor going toward the engine. Pull the hose off and spot it clear in the sensor. Meticulously disconnect the wiring for the mass air flow sensor itself. Use the screwdriver to very carefully push the connection tab totally free if the wiring junction utilizes a snap-lock to connect. Location it safely clear in the sensor unit.

4Use a screwdriver with a star-shape, or security Torx bit if the sensor is secured to the air filter box with screws possessing star-shape heads. Use a common screwdriver when the screws are Phillips-head or flat-head style. Cautiously loosen and eliminate the sensor screws and put them in a protected place to avoid losing them. Use the shop rag to very carefully twist the sensor back and forth by hand until it comes free from the air filter box.5Move the sensor unit to a clear workspace. Put a shop rag underneath it and don't touch the sensor mechanism inside. Attach the spray nozzle to your bottle of mass air flow sensor cleaner and spray the sensor clean with 5 or six fantastic sprays. Spray downward so the excess hits the rag underneath. Examine the wire inside without touching it to confirm it really is clean. Let the unit air dry on the rag for 30 minutes.

6Reattach the sensor Auto code scanner, devoid of touching the inside wire mechanism, to the air filter box and following the above removal measures in reverse order. Set up a brand new air filter in the air filter box and close it up. Confirm you reconnected the sensor wiring, re-installed the sensor's screws, reattach the air hoses and re-tightened the hose clamps. Check for missing tools also. Close the hood and restart the vehicle. Let the engine warm up and drive it to check in the event the sensor gives off a trouble code again. Replace the sensor unit fully if it does.