20 Most Recent 2003 Dodge Neon - Page 5 Questions & Answers

Make sure fuel is reaching the engine as a first step. Have someone check the TDC crank sensor for you.

2003 Dodge Neon | Answered on Mar 10, 2015

check to see if it has a block heater under the hood u will see a wire that has a plug on the end just like a fan in your house if so run an extension cord to it and plug it in at night just make sure u unplug when u want to drive some where

2003 Dodge Neon | Answered on Mar 04, 2015

I would get a new Throttle Position Sensor first.

2003 Dodge Neon | Answered on Jan 24, 2015

Wow, that's a weird one. Run flat tires?

2003 Dodge Neon | Answered on Jan 23, 2015

Intake air flow meter and air intake temp sensor give ECU information; then coolant temp sensor has big influence on fuel mix, throttle position sender tells ECU what driver wants, then O2 sensor(s) do fine trim to fuel mix.

2003 Dodge Neon | Answered on Jan 22, 2015

hear a clicking sound,but bendix gear not engaging the flywheel,(bad Bendix),or you hear nothing but a spinning sound(bad solonoid switch,maybe you hear a dragging sound as if its losing power brushes ,or armature bad,or bad battery

2003 Dodge Neon | Answered on Jan 05, 2015

First,check the vacum hoses at the airfilter boxand in back of fire wall for leaks.,then cycle your ignition key 3 times to the start position /off ,if a code is there the computer will show it on your Odometer it will start with a P as (P05052)Example; you have either a vaccum leak or a failed cam sensor. hope this is helpful

2003 Dodge Neon | Answered on Jan 05, 2015

Check the 3 motor mounts and 1 transmission mount. As they wear out the motor is allowed to shift and vibrate. Be sure to use only original dodge products though,as the cheaper ones won't last a year. This happened to me. I hope this helps.

2003 Dodge Neon | Answered on Dec 25, 2014

cracked block possible

2003 Dodge Neon | Answered on Dec 10, 2014

regarding the p0121 -
The powertrain control module (PCM) supplies a 5 Volt reference signal to the throttle position sensor (TPS) and usually a ground also. A general measurement is: at idle = .5 Volts; full throttle = 4.5 Volts. If the PCM detects that the throttle angle is greater or less than it should be for a specific RPM, it will set this code.

Possible solutions

1. If you have access to a scan tool, see what the idle and WOT (wide open throttle) readings are for the TPS. Check if they're close to the specifications mentioned above. If not, then replace the TPS and re-check.
2. Check for an intermittent open or short in the TPS signal. To do that, you can't use a scan tool. You'll need an oscilliscope. The reason is because scan tools take samplings of many different readings over just one or two data lines and can miss an intermittent drop out. Hook up your oscilliscope and watch the signal. It should sweep up and down smoothly with no drop outs or spikes.
3. If no problems were noticed, perform a wiggle test. Do this by wiggling the connector and harness while watching the pattern. Does it drop out? If so, replace TPS and re-check.
4. If you have no TPS signal, check for 5 Volt reference at the connector. If it's present, check the ground circuit for open or shorts.
5. Make sure the signal circuit isn't 12V. It should never have battery voltage. If it does, trace circuit for short to voltage and repairicon1.png.
6. Look for any water in the connector and replace TPS as necessary.
reference: http://www.obd-codes.com/p0121

2003 Dodge Neon | Answered on Dec 08, 2014

if you replace pcm the dealership has to reprogram new pcm , tcm and reprogram theft security system before car will start again.any time you replace pcm on any newer vechicles the odb 2 generation pcm control vechicles the new pcm, has to be reprogrammed.

2003 Dodge Neon | Answered on Dec 02, 2014

Usually a scanner to read the engine fault code could lead to the correct diagnosis and repair. But if this transmission was recently repaired bring it back and tell them to do their job.

2003 Dodge Neon | Answered on Nov 29, 2014

With the parking brake set and transmission in drive accelerate lightly and see if the engine raises up do the same in reverse if the engine moves up an engine or transmission mount is broken

2003 Dodge Neon | Answered on Nov 25, 2014

Its is a safety neutral switch it's let's u go in to park drive n neutral .if it goes bad you can't shift it from park to any gears.

2003 Dodge Neon | Answered on Nov 22, 2014

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