Question about 2000 Plymouth Neon

2 Answers

I have a 2000 plymouth neon the codes show up as po139 po140 po141 were are they located and what am i buying

Where are they located and how much are they? Is there just one or are there three?

Posted by on


2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert who has answered 20 questions.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

  • Expert
  • 69 Answers

Try this link it will list most of the codes and what they mean. It looks like you have a bad Oxygen sensor. Good luck and I hope this helps!

Posted on May 09, 2014

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Plymouth Master
  • 3,679 Answers

All refer to the o2 sensor right hand side ,clear the codes and see if they come back as sometimes the OBD detects a random signal and stores it even though there is nothing wrong, if the codes come back then check the wiring from the PCM to the o2 sensor as is likely to be a worn/melted wire as the last 2 codes refer to a short in that circuit ,the first is the sensor its self but the wire problem would throw this code up as well ,this is really a repair shop job as would need to get under vehicle to inspect some of the wiring etc

Posted on May 09, 2014


6 Suggested Answers

  • 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

  • 6674 Answers

SOURCE: speedometer not working in 2000 plymouth neon

Pull trim off around cluster, then usually 4 screws hold cluster in. remove them and pull everything forward. Harness is clipped on back, have to unclip to pull all way out.

Posted on Feb 23, 2009

  • 420 Answers

SOURCE: 2000 Plymouth neon shaking right front tire/wheel

This could be a lot of things, CV joint, tie rods, wheel bearings, even loose lug nuts.

Posted on Apr 19, 2009

  • 3854 Answers

SOURCE: need to know what the trouble code numbers are

P0743 is the Torque Converter Circuit Solenoid.The solenoid plug is on the front of the transmission and has a dark green/white and orange/black wire. The dark green/white should have 12V on it from fuse #10 when the ignition is on. The orange/black is a grounding wire from pin 79 of the powertrain controller which should only be grounded when the car is going over 45 mph or so. You could check that the wire is patent between the plug and the powertrain plug (near 0 ohms). The solenoid is a coil or wire so it would have a low, but non-0 resistance, maybe less than an ohm, but still not 0. To really test it you would need an impedence meter, but a good digital ohmmeter should show it to be slightly more resistance than is shown when you test the resistance of the meter leads themselves.If the resistance, the patency, and the 12V supply is all shown to be OK, then I would suspect the solenoid is not functing properly. If you are getting torque converter lock up when you accelerate slowly from 40 to 50 mph then it is working and the code is false. P1899 Park or neutral position switch stuck in park or gear. Recap: P0743 Torque converter clutch circuit faulty, P1899 Position switch to park and nutral stuck. Check the wire harness and look for any clips may be lose or disconnected and wires condition. Good luck and keep me posted. be glad to help

Posted on Jun 06, 2009

  • 2418 Answers

SOURCE: i did a diagnostic test on my 2000 Plymouth neon

"Timing Belt Skipped One Tooth or More" To fix this I would recommend replacing the timing belt as soon as possible.

Posted on Aug 31, 2009

Testimonial: "thanks"

  • 5081 Answers

SOURCE: where is the starter located in a 2000 plymouth

The starter is located under the car where the transmission and engine meet toward the front of the neon. The starter actually bolts up with face toward the transmission. You must get the car up on ramps or on a hoist to see the starter.


  • Disconnect and isolate the battery negative cable.
  • Raise vehicle on hoist.
  • Remove starter bolts.
  • Remove starter assembly.
  • Disengage latch and remove solenoid connector from starter assembly.
  • Remove battery positive connector from starter assembly.
  • It is not necessary to remove the alternator output lead from the connector.
  • Clean corrosion/dirt from the cable and wire terminals before installing wiring to the solenoid.
  • Attach battery positive connector to starter.
  • Ensure alternator output connector is snapped into the battery positive connector.
  • Tighten the captive nut to 10 Nm (90 in. lbs.) .
  • CAUTION: It is critical that the alternator output terminal be connected to the battery positive terminal of the starter solenoid, for proper operation of the charging and cranking systems.
  • Install solenoid connector to starter.
  • Ensure that latch is fully engaged.
  • Position the starter face into transmission housing.
  • Start bottom mounting bolt and thread in until bolt is snug.
  • Attach ground cable to upper starter mounting bolt.
  • Ensure the proper starter alignment before tightening the starter mounting bolts to 54 Nm (40 ft. lbs.) torque.
  • Lower vehicle and connect negative battery cable.

Posted on Dec 14, 2009

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

2000 Plymouth neon trans sensors location

Hi Debbie, I'm Al with Big A's Auto Repair
Debbie, the speed sensors on the transmission or located on the side of the transmission there are 2 sensor an Imput and an Output speed sensor. For further assistance go to my website. Have an awesome day Debbie.
Auto Repair

Oct 22, 2014 | 2000 Plymouth Neon

1 Answer

Error code P0455 on a 2000 Plymouth Neon

evaporative emission control system /purge control valve circuit shorted

Dec 05, 2013 | 2000 Plymouth Neon

1 Answer

2000 plymouth neon p1899

According to my source, code 1899 is a problem with the governor pressure sensor. But 4 digit codes are model specific, so you may be right about the selector switch.
If the switch tests out to be faulty, it would need to be replaced and the code erased.

May 04, 2013 | 2000 Plymouth Neon

1 Answer

Cant find the 2 wires that lead to MAF/IAT int plymouth neon 2000

The neon does not have a MAF sensor. The intake air temp sensor is located in the air snorkel between the throttle body and the air filter.

Apr 04, 2013 | 2000 Plymouth Neon

1 Answer

Where is the torque converter clutch solenoid located on a 2000 Plymouth Neon?

I think it's right by the bell housing. There is a plug-in going to it. Raise the hood and look straight down to the transmission and you will see it.
FGTech Galletto 2-Master EOBD2

Sep 11, 2012 | 2000 Plymouth Neon

1 Answer

1997 blazer codes po137 po140 po141

Those codes all deal with oxygen sensor #2 (after the catalytic converter) on bank #1. P0141 deals with the heater circuit of that sensor. I would start by checking the wiring to that sensor. The sensor itself could be bad. The catalytic converter could be also bad although that wouldn't explain the code P0141.

Jul 04, 2011 | 1997 Chevrolet Blazer

1 Answer

2000 Plymouth Neon leaks oil at high speeds only; it starts leaking about 45mph not sure what, or where it is coming from.

there is a special dye that you can buy that gives the oil some color making it easy to see where the leak is coming from

Feb 21, 2011 | 2000 Plymouth Neon

1 Answer

Codes for a 2000 plymouth neon p1684 and p0551 can you tell what they are thanks

The P1684 code simply means that the battery has been disconneted within the last 50 starts.
P0551(power steering pressure switch)

Aug 05, 2010 | 2000 Plymouth Neon

1 Answer

Where is the crank sesnor on a plymouth neon located ? What to do if I got a code p1390 from an obd 2. And how do I fix it?

on most chrysler vehicles it is mounted to the transmission bell housing on top it reads off of the flywheel ring. it will have to bolts holding it in right on the bell housing flange.

Aug 30, 2009 | 2000 Plymouth Neon

Not finding what you are looking for?
2000 Plymouth Neon Logo

85 people viewed this question

Ask a Question

Usually answered in minutes!

Top Plymouth Experts


Level 3 Expert

76682 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8531 Answers

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

Answer questions

Manuals & User Guides