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I have a Mitsubishi eclipse 95 and the check engine light codes are 12, 25,41, and 55. So what's wrong with my car??? I can't find what these codes mean

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  • JohnnyC96 Jan 05, 2013

    i have a 95 eclipse as well and my codes are 12, 54 and it read 25 two times... kinda leaves me cofused.. can someone please help

  • JohnnyC96 Jan 05, 2013

    i have a 95 eclipse also and my codes read 25 twice (kinda confused) and 54... i know 25 means IAS but why would it read it twice? and 54 is no cam sig... whats that?

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  • Cars & Trucks Master
  • 17,970 Answers

Hi there:

Code 12 - Battery or power line recently disconnected - This code is normal if the electrical system has been worked on or the battery has recently been disconnected. It will be removed after 15 ignition switch on/off cycles.


Code 25 - AIS (Automatic Idle Speed) motor circuit shorted or target idle speed not reached


Possible Causes:
- Vaccum leak - Check all vaccum lines for cracks or breaks.
- Bad connection or wiring - Check the wiring and connections between the logic module and the motor. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.
- Shorted or frozen AIS motor - The AIS motor is located near the TPS. For 1987 or earlier Turbo I engines, remove the bolt and slide the motor out (you may have to wiggle and twist it). Remove the clamp and carefully pull out the motor. Be sure and observe how it goes together, especially the orienation of the rotatiing valve inside. Hook the motor to a 12V supply to see if it runs. If it doesn't, replace the AIS. Clean all the gears and shafts throughly and reassemble the gear and valve assembly. Spray all the gears and parts with TriFlo or a similar silicone spray lubricant (don't use WD40 because it evaporates) and insert the motor. If the engine seems to race wildly after assembly (give it some time to get control), you probably installed the internal, rotating valve backwards.


Code 41 - Alternator field control circuit open or shorted

Possible Causes:
- Bad connection or wiring - Check the wiring and connections between the logic module and the power module. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.
- Bad voltage regulator circuit


Code 55 - End of message
No further fault codes are stored. If this is the only code received, then there are no codes stored in memory. This code will always be given, even if nothing is wrong. If you do not get this code, then you may not be retreiving the codes properly, or the power loss light may be burnt out. The light should come on for 1 second when the ignition is initally turned on as a bulb test.




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Posted on Oct 31, 2012

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SOURCE: 1997 2.0 y code engine mitsubishi eclipse

P1390 - Timing belt skipped 1(or more) tooth

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SOURCE: 2000 Mitsubishi Eclipse will not idle, all else OK, just repl bat

I can only offer these few ideas.

  1. The TP throttle position sensors for this year group fail often Pin 1 to Pin 4 resistance should be 3.6 to 6.3 ohms but you need to remove the two 7mm bolts that hold this sensor on the front side of the throttle body, then rotate the two bolstered center and see a change in resistance from low to high. If the resistance remains fixed, the sensor is rusted out and must be replaced.
  2. The IAC motor is mounted on th LH side (driver's) of the throttle body. It should make a clicking sound when the key is turned from Lock to Run. Pin 2 to Pin 1, Pin 2 to Pin 3, Pin 5 to Pin 4, and finally Pin 5 to Pin 6 must all have continuity at 38 to 52 ohms.
  3. Check for any vacuum leaks.
  4. Remove clean and check EGR.
  5. If this is a Cranks but will not start problem, check the owners manual for Theft Deterant UNLOCK proceedure. If there is power at the rear fuel pump relay coil and no power at the MFI/ASD front relay coil and no spark, then its the security system.

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SOURCE: brake light bulb Mitsubishi Eclipse Cars

look for access panels in rear hatch there will be one on each side remove those and there will be 10 ml nuts holding the light housings on remove those then you can access the lights

Posted on Jul 02, 2009

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