CEL P1400 MDP sensor questions?

Your MDP (Manifold Differential Pressure) Sensor is done. It's not going to effect your drive ability. It's really only there to make sure your EGR valve is working properly (it helps display the readiness code for it) it's just to tell the ECU that the EGR valve is working properly, you'll get a CEL for the sensor being out and your readiness code for the EGR won't show ready. By replacing it it should remove MIL light after driving it for a while

 

I would drive for at least 50 miles highway

 

I'm not sure how Texas emissions works but, with a 98 I'm pretty sure you can have a max of 2 monitors not ready for emissions to pass. As for the CEL here in PA if the light is on, the machine automatically fails the car. The worst thing you can do for readiness monitors is disconnect the battery, because they all reset everytime you do that. Every time the CEL is turned off with a scan tool the monitors are reset as well. Just something to think about before going, and perhaps paying for the test and not passing. Here in PA you pay for the test pass or fail. Get a mdp sensor and have a autozone or advance shut the light off for you and drive like stated about 50 to 75 miles and you should be good. You could also ask them at zone or advance to tell you how many monitors are ready.

 

Ah ha! I never thought about looking for this before but check it out, the DSM emissions Wiki. Hopefully that gives you more info

OBDII Emissions Testing and the DSM - DsmWiki

Also try this, it's easy enough anyway
http://wiki.answers.com/Q/How_do_you_set_obd2_readiness_monitors

And this, from http://www.crxsi.com/info/driveability-diagnostics-emissions/OBD2-Diagnostic-Tips.htm

More confirmation

http://www.aaapa.org/wp-content/uploads/2010/08/obdii_issues.pdf

And this is TSB#00-13-005 mentioned in the link above
http://mitsupartsworld.com/Diamante TSB/tsb0313005.pdf

Let us know how it turns out for ya!

 

Nice job NHerron that actually helped me out too thanks

 

Hey no problem. I hate emissions codes. In fact, I have another thread on emissions codes. Not sure but I might try making something simulation wise to bypass the solenoids. They are a little tricky! I figure if DSMlink can do it I can at least try to figure it out

http://www.dsmtuners.com/forums/electrical-tech/435665-what-check-next.html

 

Code needs to be reset with any cheapo OBD-II scanner

 

I have this code every 3 starts of the car. It doesn't matter the mileage, as I have driven 300 consecutive miles (very recently, we moved across state) without it coming on. But if I start the car x amount of times it pops up, I'd have to look through the FSM again on this code though, I believe it has to meet a few requirements during each start up (ie drive above 40MPH for at least 60 seconds etc)