MAP Sensor Cleaning Step-by-Step Disconnect the MAP sensor connector and put on rubber gloves to protect your skin. Use an electric parts cleaner on a soft rag or paper towel to clean the outside of the MAP sensor. Spray the electric parts cleaner into the sensor port — a couple of spritzes are usually sufficient. Click to see full answer. Hereof, how do you clean a Dodge map sensor? How to Clean a Map Sensor on a Dodge Cummins Park the Dodge vehicle and allow the Cummins engine to cool down. Open the hood of the truck and locate the MAP sensor. Depress the two release tabs on the sides of the electrical harness. Remove the screws that secure the MAP sensor in place with a #15 Torx head. Remove the sensor from the vehicle. One may also ask, can you clean a map sensor with alcohol? Spray the alcohol liberally over the MAF sensor. Be sure to cover the MAF sensor’s wires, intake and all its crevasses to thoroughly clean the part. Do not touch or scrub the MAF sensor’s wires because they are very delicate and could break. The alcohol will remove all the impurities on its own. Secondly, should I clean or replace MAP sensor? Dirty or faulty MAP sensors can lead to rough idle and engine problems. They get dirty over time along with the rest of the insides of an intake manifold, and it’s good practice to service them by just cleaning from time to time. Or if faulty, it will need replacing.Can you use wd40 to clean map sensor?And yes its fine to clean the sensors with wd40, remove the sensor apply it on harnesses and sensing zone too.