2001 Mitsubishi eclipse failed smog erroe code came up Manifold Differential Pressure Sensor Circuit. where is thie located at in the engine?

The P1405 trouble code on a 1996 Mercury Tracer indicates an issue with the differential pressure feedback electronic sensor circuit (DPFE). The DPFE sensor is located on the driver's side of the engine compartment, mounted to the firewall.
To locate the sensor hose, follow the black rubber hose that connects to the sensor. The hose will lead to the EGR valve, which is located on the intake manifold.
Unfortunately, I am not able to provide pictures, but a quick online search may yield helpful visual aids.

Definition of Diagnostic Trouble Code P1400 Audi: EGR Valve Circ Electrical Malfunction BMW: Heated Catalyst Battery Voltage or Current too Low during Heating (Bank 1) Chrysler: Manifold Differential Pressure Sensor Circuit Malfunction Dodge: Manifold Differential Pressure Sensor Circuit Malfunction Ford: Differential Pressure Feedback EGR Circuit Low Input Hyundai: EGR System Monitor Malfunction Infiniti: EGRC Solenoid/V Jaguar: Exhaust Gas Recirculation Valve Position Control Jeep: Manifold Differential Pressure Sensor Circuit Malfunction Lexus: Sub-TPS Malfunction Lincoln: Differential Pressure Feedback EGR Circuit Low Input Mazda: DPFE Sensor Circuit Low Input Mercedes: EGR Switchover Valve Malfunction (C230 Only) Mercury: Differential Pressure Feedback EGR Circuit Low Input Mitsubishi: Manifold Differential Pressure Sensor Circuit Malfunction Nissan: Differential Pressure Feedback EGR Circuit Low Input Subaru: Fuel Tank Pressure Control Solenoid Circuit Low Input Toyota: Sub-Throttle Position Sensor Malfunction Volkswagen: EGR Valve Circ Electrical Malfunction

that code is for the MAF sensor , firstly clear the code and test drive and see if there is any improvement , if not then change the MAF sensor located on the inlet manifold

Hi there,

Diagnostic codes # P0115 to P0119 all relate to the ECT (Engine Coolant Temp) sensor circuit.

Assuming you have correctly diagnosed a faulty ECT sensor, here are the instructions to locate and test:

* Look for a bolt size sensor with a wire attached - on Mitsubishis, the ECT sensor is usually located either on the Intake Manifold, or close to the Thermostat housing (to measuer coolant temp).

This is what is looks like:


* To test the ECT sensor:

* With the sensor portion immersed in hot water, check resistance as per the table below (convert to degrees F if necessary):


* If the resistance is too far out of spec, then replace the sensor.


Cheers,


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Passenger side, after the catalytic converter.

A code P0401 most likely means one or more of the following has happened:

•The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
•There is a blockage in the EGR (tube), most likely carbon buildup
•The EGR valve is faulty
•The EGR valve may not be opening due to a lack of vacuum

In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.

•Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticeable difference in RPM's with the EGR open
•Clean out the EGR valve and/or tubing to remove deposits
•Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
•Replace the DPFE sensor (with a good quality / OEM one)
•Replace the EGR valve

it's right adjacent to the cataytic converter

I don't know how the above could have any effect on temperature. Is the vehicle full of coolant? In my opinion you have two different issues

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MDP sensor circuit...most common place is within the distributor cap...start there.