Question about 1995 Dodge Spirit

1 Answer

Code 12 1995 dodge spirit 2.5 battery and PCM NOT disconnected. where does the pin 3 on PCM gets its battery suppy voltage from

Car runs very rough. Not driveable code 12 shows. look it up. Battery and computer was NOT disconnected. code 12 says no battery voltage at pin 3 on PCM where does that wire to pin 3 connect to get battery voltage

Posted by on

  • 2 more comments 
  • George Hawkes Feb 24, 2012

    Jeremy W
    I'm new at this site and do not know how to contact you
    Per your questioin the battery is FULLY charge.

  • Jeremy W.
    Jeremy W. Feb 24, 2012

    I get an email when you comment. I will get back to you as soon as I can.

    Ignore the code 12. Does not have anything to do with you problem.

    Concentrate on the items I described below. If there was no power to the PCM at any of the power supply pins (one constant and 2 ignition, from memory there may be one more) than the vehicle would not start at all.

  • George Hawkes Feb 24, 2012

    Jeremy W
    With all spark plugs removed the compression in each cyl is 140 to 150.
    I have change the spark plugs wires, dist cap, rotor sensor in dist.
    I also change the o2 sensor had 150000 miles on it and also the egr valve.
    once in a while the engine will start normal and run fine for a short time like a few minutes
    Then runs rough and little power.
    Can a bad fuel pump make it run normal for a few minutes then run poor again??
    Thanks for taking the time with my problem

  • Jeremy W.
    Jeremy W. Feb 24, 2012

    Check spark on the coil wire with an adjustable spark tester. You should see at least a half inch of hot blue spark. If it is orange or not sparking than maybe you have a bad coil.

    Another thing you can do when it starts to run rough is unplug the coolant temp sensor located near the t-stat housing. If the idle drops and the engine smooths out than there may be an issue with the temp sensor giving the wrong signal.

    here's another thing you can try. When its running rough try adding a couple of shots of carb spray into the throttle body. If the idle smooths out than there is a fuel issue or you may have a vacuum leak.

    give those three a shot and let me know what you find and we'll go from there.


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.


    An expert that got 10 achievements.

  • Dodge Master
  • 5,332 Answers

Has the battery been disconnected or been low on charge in the last 50 ignition cycles?

Code 12 means that battery power has been disconnected within the last 50 ignition cycles. it does not mean there is no battery power to the computer

Pin 3 should be a red/white wire that is the constat power supply to the PCM. It is protected by a fusible link located neer the drivers side strut tower. If that link was bad the car would not start or run as it also supplieds power to the asd relay, fuel pump relay, and the ssd relay.

I would put money on the the problem being igntion (plugs wires cap rotor), compression (low cylinder compression usually cylinders 2 and 3), lack of fuel delivery (low fuel pressure, a weak or dirty injector), timin (timing belt jumped, worn distributor, look exciter ring), or possibly a plugged catalytic converter.

I would check compression first especially cylinders 2 and 3. It was pretty common for the head gasket to fail in between these two cylinders.

Posted on Feb 24, 2012

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

a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer


Code 113 is a problem with the air charge temp sensor output. It measures the temp of the air in the intake manifold.
Code 0603 is loss of ECM memory - usually when the battery is disconnected.
Code 1728 is a problem with the transmission - the sensors in the trans told the computer the transmission slipped between shifts.
There is a tech service bulletin from Ford for 1996 model trucks so you may want to check with them on that one.
The first code can cause driveability problems.

Jun 26, 2012 | 1997 Ford F350 Crew Cab

1 Answer

Upon startup engine idles rough then speeds up and returns to normal idle .After a couple of minutes the volt light comes on then no power then a complete shut down.Starts back up for a while then shuts...

OK, the volt light means that the alternator is not charging the battery. It could mean the battery is shorted out, or the battery is bad or low on charge due to an alternator not charging.

Replace the Alternator and battery as indicated by standard voltage output tests under load.

The computer in the car will not operate the engine properly on low voltage.

Fixing the charging system, may resolve the rough idle (meaning that it may be trying to relearn after data was erased by low voltage of the battery), and the speed up.

Try the charging system first, and once that is repaired, reevaluate the engine driveability and speed and idle smoothness, after it relearns.

Good luck on this repair.

Nov 06, 2010 | 1999 Buick LeSabre

1 Answer


You problem could be one of two thing a charging problem or a battery dying. yes you can get the voltage but not get the amperage to charge a battery. Do the lights dim at idle and brighten as you accelerate? Does the car continue to run but the battery goes down after sitting for a while? DO NOT DISCONNECT THE battery cables with the vehicle running as this can result in damage to the charging and other systems. Here are things i look for (1) does the car start on it owns without a jump? (2) does the vehicle idle smooth? A dying battery uses more charging load on the alternator and can result in rough idle and poor performance and gas mileage. (3) this is an odd one but but has helped int he past, does the battery smell like rotten eggs? When a battery is dying it can stink when it is getting a charge from the alternator. To be sure go to your local auto parts store for a free battery and charging check. Takes few minutes and no cost. Hope this helps.

Mar 05, 2010 | 1988 Mazda MX-6

2 Answers

I need to know what the following codes mean for a 1989 Dodge Ram. 12 24 35 52 17

12 Battery or computer recently disconnected (will occur on most cars most of the time, it indicates a low / missing battery happened in the last 50 key starts. Don't worry about it. — Tom Wand)

24* Throttle position sensor over 4.96V (SEE NOTE #3)

35 Cooling fan relay circuit open or shorted

52 Oxygen sensor stuck at rich position (SEE NOTE #5!)
52 Internal logic module fault ('84 turbo only)

17 Engine stays cool too long (bad thermostat or coolant sensor?)

Matt Rowe: “The throttle postion circuit tells the computer how far the accelerator is depressed. The Throttle Position Sensor (TPS) is on the throttle body on the opposite side of the throttle cable. The connector should have a round rubber cover over the connections. Clear the fault codes, start the car and try jiggling the wires/connectors to try to trip a fault code. Loss of this signal could cause other problems.”
Tom Wand: “Throttle Position Sensors (TPS) will on some early 1990s trucks start to drift high in voltage, there was a problem with these and the idle will not set low enough. Need to replace if it does this. As I recall, the output voltage at idle is 2.4 volts, much above is no good.”

Wade Goldman wrote: In my case, the breather tube leading into the catalytic converter had rusted and become detached. This some how would cause the sensor to read an over rich condition and run crummy. I did not trust the reliability of the weld over a corroded surface and opted for the more expensive route of replacing the converter, breather tube and all.

More details can find in 80s-codes

Hope thats help (remember rated this FREE help) Good luck.

Jan 29, 2010 | 1989 Dodge Ram D-Series Pickups

1 Answer

Sir, I own a jaguar s-type 2000 4.0 runs very rough

Its not codes, what they mean is this. Your car learns how you drive, this information is stored in the Engine computers memory. If the battery is disconnected or is discharged, this memory is lost along with certain other operating parameters. One of the things lost is the "idle point" The cars computer should rewrite this information itself within about 50 miles of driving, if it does not, you may have to disconnect the battery again, leave it disconnected for about 5 minutes and then reconnect. Drive the vehicle to reload the lost information. Now, did you charge the battery whilst it was still connected to the vehicles electrical system..? If you did, you may have damaged the cars computer. This happens due to the higher voltage supplied by all battery chargers.. If disconnecting the battery does not seem to help, take the vehicle to a professional and have the cars computer checked properly.

Dec 12, 2009 | 2000 Jaguar S-Type

1 Answer

Code 1 2 2 1 2 1

CODE 12 Problem with battery connection. Direct battery input to pcm disconnected within the last 50 ignition key-on cycles.

CODE 21** Problem with oxygen sensor signal circuit. Sensor voltage to computer not fluctuating.

The 12 is not problem, just advise that your battery has recently disconnected; the repeat 21, maybe can be for two O2 sensor, review it.

Hope helped (remember rated this help) Good lick.

Nov 05, 2009 | 1995 Dodge Neon

1 Answer

97 dodge ram 1500 2wd automatic 5.8 lt. engine codes 12, 46, 21, 56.

12 problem with battery battery input to pcm disconnected within the last 50 ingnition key on cycles. 46 charging system voltage too indicates that battery voltage is not regulated. 21 problem with o2 sensor signal circuit. 56 no code for #56

Nov 03, 2009 | 1997 Dodge Ram 1500 Club Cab

1 Answer

2005 jeep grand cherokee limited 5.7 hemi vehicles hesitates

The egr valve is located on the front of the right cylinder head. It has a tube attached to it and going to the intake manifold.It has failed and is why your jeep is running rough and hesitating. Replace it and it will fix your driveabllity issues. Disconnect the battery for 2 min to clear the code.

Apr 01, 2009 | 2005 Jeep Grand Cherokee

1 Answer


manufacturer does not provide a specific computer relearn procedure for obtaining proper driveability . if the battery was disconnected or replaced , driving the vehicle will enable the computer to preform a relearn procedure for obtaining proper driveability , driveability may differ from what you are used to until computer has fully completed the relearn procedure . cheers

Jan 09, 2009 | 2000 Mitsubishi Montero Sport

1 Answer

When the traction control light comes on it shuts the motor down to 1000 rpms. is there a sensor that controls that? 2001 cavalier

sounds like your alternator is not giving out the correct voltage or isnt giving out any voltage. computers need the correct voltage to work properly. if your alternator is bad and your battery gets drained then that could make the computer give funny codes and make it run rough. the simple test is to unplug your positive battery cable after you start the car and see if the car still runs. if it does then the alternator is working. if you have a volt meter you can make sure that the alternator is giving out between 12 and 15 volts.

Jul 30, 2008 | Chevrolet Cavalier Cars & Trucks

Not finding what you are looking for?
1995 Dodge Spirit Logo

297 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dodge Experts


Level 3 Expert

75117 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7772 Answers

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

Answer questions

Manuals & User Guides