ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Technical Discussion - Beginner / Repair => Topic started by: sidekickyc on March 01, 2016, 10:25:34 PM
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Getting Error Code P1408 MDP Sensor circuit malfunction~ Manifold pressure differential
The three thing I found on line to check are:
Faulty MAP Sensor.
Censor harness open or shorted.
MAP sensor circuit poor electrical contact.
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Is there a why to check if the Sensor is bad?
Thanks
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Getting this same fault. Removed it, it's sooty but clean enough and passages aren't blocked. My air filter is very dirty I wonder if that can have an effect? Added a can of seafoam, going to drive a bit and monitor my map sensor, is it noticeable if the valve opens?
Anybody have a diagram so I can see which terminals to test?
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Bandit - I might be mistaken, but I don't think you and sidekickyc are talking about the same thing - if you are, then you have a serious issue somewhere.
What you're describing there sounds more EGR related than MDP.
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P1408, the Internet believes it is the EGR fault. While monkeying around I noticed my car didn't have a MAP reading. I went down to the local part source that has a scanner, had it read, no map reading. p1408 is the map sensor. Actually had 2 faults on that not just one.
Back home I got the meter out. Sensor gets a solid 5v, and a good ground. Removed the map sensor and hooked up a vacuum, had to poke through the wires to get a reading, but again verified a 5 volts and ground, and an alternating 1-5 volts. Signal. Map sensor good. Next I went to the ecu to see if signal arrives. The second plug from the left wasn't all the way in. Seemed stiff. I removed it only to find 4 or 5 pins twisted around and bent!!! After removing the ecu I straightened all the pins, plugged it back, so far no p1408 codes.
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The big challenge with the internet is deciding which source is credible and which is not.
Maybe a P1408 is an EGR related code on some make of car out there, but on a Suzuki, it has a very specific meaning - MANIFOLD DIFFERENTIAL PRESSURE CIRCUIT MALFUNCTION - the details are there in Sidekickyc's post - the only thing he has missed is the vacuum port that the sensor connects to.