Got a code P1400 (Manifold Differential Pressure Sensor circuit) changed the MAP sensor and air filter, and reset the check engine light. about a week later it came back with the same code. I dont see any loose hoses/connectors, and it seems to be running pretty well, it just drives me crazy seeing it there! What would you guys try next? Thanks in advance!

 

how did you reset the cel ????

 

I reset it with the same scanner I used to download it.

 

I have a Diamante 2001 that had a P1400 check engine code. I replaced the manifold differential pressior sensor or mdp sensor part # MD305600 and that took care of the problem. Advance Auto wanted $167 for it I got it from LKQ for $5. Pull-a-part may have some cars that may have it also because this part is used in many Mitsubishi modules.