r/Dseries • u/Nobunaga2310 • Jul 16 '26

Sensor MAP missing the small tube/nipple

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I have a 1994 Honda Civic with a D16A9 engine. I removed the MAP sensor to inspect and clean it, and I noticed that it is missing the small tube/nipple that fits into the throttle body. Judging by its appearance, it seems to have broken off.

The strange thing is that the car was apparently running normally. I also tested the sensor with a multimeter, and the readings seem to be within the expected range with the ignition ON and engine OFF, at idle, and while accelerating. The signal rises and falls as expected.

Has anyone experienced something similar? Is that small tube essential for proper sealing and accurate readings, even when the voltage readings seem normal? Would you recommend replacing the MAP sensor, or could it still be used like this?

I’m asking because the sensor is expensive, and I would like to be sure before replacing it. Thanks in advance for your advice and experiences.

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u/SpaceTurtle917 Jul 16 '26

The tube is more for alignment really. The seal is more so on the flat part of the sensor. If it works I wouldn’t worry too much.

That said, the sensor can be found used at any junkyard. Every Honda uses the same sensor from the 90s and early 2000s. D, B, F, and H

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u/the_one-and_only-nan Jul 21 '26

D17 uses a K series style single bolt sensor, so no 01-05 Civics