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Monday, May 10, 2010

Peugeot 206 MAP Sensor

I've noticed a bit of engine oil in the air intake into the throttle body. I guessed some of oil could have fouled the MAP sensor (Manifold Absolute Pressure Sensor), perhaps causing the strange gear change problem when the engine is started from cold in the early morning.

I'm also wondering whether the blended engine oil could have caused this. Yes, in the effort to make use leftover engine oil, I've mixed several brands together. The bad thing about this now is that there's a lot of oil in the air hose from the engine to the throttle body, which should not be the case. Lesson learned, mixing engine oils is bad.

After taking out the MAP sensor, sure enough it was soaked in black gooey engine oil. Did a bit of cleaning and now it looks cleaner.

The location of the MAP sensor.


The Bosch MAP sensor.


Removed much of the oil from around the yellow blob, which I guess is the sensor.




Cleaning the sensor with contact cleaner results in better throttle response and more stable idling.

Here's other people cleaning their MAP sensor.

Dodge Cummins MAP cleaning:
http://mopar.mopar1973man.com/cummins/2ndgen24v/map-sensor/map-sensor.htm

Jeep Liberty MAP cleaning:
http://liberty.eurekaboy.com/mapsensor.htm

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