Question about 2000 Mitsubishi Eclipse

1 Answer

2000 eclipse gt getting a po1400 code and car does not idle right all the time and sometimes it dies. Mechanic said it was ecm, any ideas

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Expert
  • 32 Answers

PO1400 is not a common code. PO140 however is. PO140 is a oxygen sensor problem, it refers to bank 1 sensor 2 having no activity. This could cause your eclipse to not hold a good idle and possibly to stall. I would have a different mechanic check the car before you spend quite a bit of cash on an ECM as they can cost upwards of 800 dollars

Posted on Sep 11, 2010

  • 65bulldog Sep 11, 2010

    the code 1400 was auxillary emissions according to the parts store

  • Nick Sep 11, 2010

    Ok I actually had to do a little homework on this other than just thinking and using what I already knew. P1400 is a code for the Manifold Differential Sensor. This is cause by voltage to the sensor being incorrect. Either the voltage is too low or too high for more than 2 seconds. This can be caused by a multitude of different things including the ECM. However it could be as easy as the sensor not being plugged all the way in. First I would check to make sure that it is plugged in all the way. If it is I would replace the sensor first. It is the cheaper way to go. after that unfortunately the ECM would be the next step. It will run you around 1500 for an automatic and about 900 for the one that goes with a manual trans. (please keep in mind that these are prices for ECMs from the dealer) However this can also be caused by a short in the wiring (a spot of bare wire grounding out to somewhere). So replacing the ECM may not solve your problem. Your mechanic is taking the expencive route first by replacing the ECM. You may want to take it back to him armed with a little more knowledge that you now have and have him replace the sensor first. If it works then you have fixed the car for a third of the cost of replacing the ECM.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a 2000 Mitsubishi eclipse and my radiator fans run from startup a few minutes after shut off.It affects heat until higher rpms.i need better heat and quicker.

Here are a couple of thoughts on this problem:

1. Just for fun and giggles, it might be a good idea to have the thermostat checked one more time. I know it is a new thermostat but you never known if a thermostat may have failed even right out of the box. It is possible that thermostat could be shot, even thought it was new. I know it is a long-shot, but it never hurts to give it a try.
2. Check the fan sensors. The Eclipse has used an electric, rather than mechanical, fan for some time. It is possible over time that the start and stop sensors can go out of tune and that they can raise your fan's run rate on starting, cruising and idling. In this case, the mechanic is right in that the higher speed is causing the coolant to be cooled off more quickly than it should and the result is that your vehicle's cooling system is causing problems for your Eclipse's heater sensors. If the sensors don't get information that the coolant flowing through their portion of the cooling system isn't the right temperature then the heater won't kick off and all that will happen is that the heater will wait until it senses the coolant is the right temperature.

Feb 22, 2015 | 2000 Mitsubishi Eclipse

1 Answer

Security system on 2000 eclispe GT

Use the KEY (not the REMOTE) to UNlock the driver's door or the trunk. Then use the key to START the car, then shut it off. Finally, get out and LOCK the car using the mechanical KEY. That should clear the security system codes caused by disconnecting the battery!

Apr 24, 2017 | 2000 Mitsubishi Eclipse

1 Answer

I did the Valve cover gasket, spark plug and wires on my girls 2000 mitsubishi eclipse GT and I put everything back to where they go. And right when I started it up, Knocking and rough idle occured. T

sounds like u left a vacuum line disconected or a emision line off recheck to make sure u hooked everything back up. sometimes when disconectimg wires and hoses u move them out of the way and they get hidden.

Oct 03, 2012 | Mitsubishi Cars & Trucks

2 Answers

My mistubishi eclipse GT 2001 strts up just fine but after 10 min. or just after it starts to warm uf it looses its ability to idle. if uit ildles down to below 1500 rpm. it will just die. (stops running)...

The mentioned problem could refer to 2 things, O2 sensor or "clogged" injection system.
If the car changes the RPM dinamically then it would be O2 sensor, often stalls. Regarding clogged injection, preliminary try to rev to higher RPM, if that is the problem fast you will see the difference (maybe solves the problem, maybe will require cleaning.

Sep 21, 2011 | 2001 Mitsubishi Eclipse

1 Answer

I have a 1984 prelude that will not idle, sometimes it will idle at 1500-2000 rpms for a short time then drop down and die. It does rough idle at around 800 sometimes

while running try spraying starter fluid around intake manifold if any change you have vacuume leak. most likely the ecm says i have to much air so that is why it dies it changes gas and air flow

Aug 04, 2011 | 1984 Honda Prelude

1 Answer

2000 Celica GT-S. Engine 'bucking' anywhere from idle to wot

locate the mass air flow sensor. it's located inline with the air intake. it should be right after the air filter. disconnect the plug and see if the car runs better. also, when tapping on it lightly on the sensor with a screwdiver handle and the engine skips, could also indicate a bad sensor. these sensors will not always set the check engine light. suspecting the fuel system is also a possibility

May 27, 2010 | 2000 Toyota Celica

1 Answer

Engine hestitation, 2000 subaru forester

I think these codes are indicating a fault with your catalytic converter. The 02 sensors are each not returning the correct values to the ECM, causing a "suspect the 02 sensors" fault code.

Apr 01, 2010 | 2000 Subaru Forester

2 Answers

Eratic idle

adjust it to 16 degrees then, this should compensate the wear on your timing belt, but also then I recommend to replace your timing belt soon.

Dec 29, 2008 | 1994 Mazda MX-6

Not finding what you are looking for?
2000 Mitsubishi Eclipse Logo

Related Topics:

563 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mitsubishi Experts


Level 3 Expert

79865 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8836 Answers

Are you a Mitsubishi Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides