Question about Dodge Stratus

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Just recieved a P0123 code but the Idle runs smooth not rough could this be a false alarm?

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Check your gas cap

Posted on Jul 22, 2008

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Have 3.0 24 valve engine has intermitten rough Idle and during driving at excelleration


What are the trouble codes set? Get them read for free at most auto parts stores.

Dec 10, 2014 | Cars & Trucks

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2001 Hyundai Accent GLS 1.5L


First you need to clear the codes. If these codes are from before you did the work. The ECM still thinks it's bad. Then if they come up again start with one and work your way through.

Aug 18, 2014 | Hyundai Accent Cars & Trucks

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P123 on chrysler 300


Hi Marcos:
We are assuming that you are talking about DTC (Diagnostic Trouble Code) P0123 Code.

A P0123 code means that the the car's computer has detected that the TPS (throttle position sensor) is reporting too high a voltage.

Symptoms may include:
- Rough idle
- High idle
- Surging, other symptoms may also be present

A code P0123 may mean that one or more of the following has happened:
- TPS not mounted securely
- TPS circuit short to ground or another wire
- Faulty TPS
- Damaged computer (PCM)

About the solutions, if there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, carefully inspect all wiring and connectors that lead to the TPS. More than likely the problem is with the TPS wiring. Check the voltage at the TPS (refer to a service manual for your vehicle for this specific information). If the voltage spikes or is too high (over 4.65 volts with key on, engine off), then that is indicative of a problem. Carefully trace each wire from the TPS wiring harness to check for breaks, rubbing against other components, etc.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Feb 10, 2012 | 2008 Chrysler 300

1 Answer

Rough idle and code po1562


First u have to take it to ur car dealership they have scan tool the scan tool will read the fault code and tell u which part or sensor is in faulty that way it's easy fix

Jan 20, 2012 | 2001 Volkswagen Jetta TDI

1 Answer

The service light came on and i checked the diagnostic code which read P0123


A P0123 code means that the computer has detected that the TPS (throttle position sensor) is reporting too high a voltage.


Symptoms may include:

  • Rough idle
  • High idle
  • Surging
  • other symptoms may also be present

A code P0123 may mean that one or more of the following has happened:

  • TPS not mounted securely
  • TPS circuit short to ground or another wire
  • Faulty TPS
  • Damaged computer (PCM)

If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, carefully inspect all wiring and connectors that lead to the TPS. More than likely the problem is with the TPS wiring. Check the voltage at the TPS (refer to a service manual for your vehicle for this specific information). If the voltage spikes or is too high (over 4.65 volts with key on, engine off), then that is indicative of a problem. Carefully trace each wire from the TPS wiring harness to check for breaks, rubbing against other components, etc.

Feb 04, 2011 | Jeep Wrangler Cars & Trucks

1 Answer

Mis fires


The engine in your car is designed to run smoothly with maximum power output and produce as minimal emissions as possible. When your car's engine is not performing properly it can cause, low gas mileage, low power output, increased emissions and possible internal engine damage if left untreated. This troubleshooting guide is designed to isolate the malfunctioning cylinder and troubleshoot to repair the problem. Before we start we need to know one of two things; is the engine running poorly at idle only and seems to be ok under power? Or does the engine run fine and it's just the engine idle condition that is the problem. If your engine is idling rough please visit, engine misfires at idle If your engine cranks over but won't start visit engine wont start. If your engine won't crank over visit engine wont crank over. If your engine is running rough all of the time or intermittently you are in the right place. Below we have created a guide to aid diagnoses and repair procedure for most common rough engine running problems.

  • Step 1: Anytime you have a problem with electronically controlled components such as an engine, transmission, ABS brake, or SRS (supplemental restraint system, air bag) inspect all fuses in the under hood power distribution center and under dash fuse panels using a test light. If all fuses test ok continue to the next step.
  • Step 2: To check for problems with electronically controlled components such as an engine, transmission, ABS brake, or SRS (supplemental restraint system) and the fuses test ok a trouble code scan is needed to identify any system trouble. Use a simple scanner tool to retrieve trouble codes and check if they relate to the specific problem, like an ignition coil failure code. If a trouble code is present but does not pertain to the immediate problem like an EVAP code ignore it until a later time, after the engine is running properly. The reason we repair non-related codes after the engine is running properly is because sometime false codes can be triggered by a rough running engine. Once the engine is running properly the code present might cycle and turn itself off. You might say "if the engine isn't running right shouldn't it have a check engine light and a trouble code?" Sometimes conditions occur that will not be detected by the computer, example: if the intake or exhaust valve operation fails the computer cannot detect the failure because the problem is not sensor related, so the engine doesn't run smooth and the computer thinks everything is ok with no codes. If the trouble code retrieved relates to a cylinder misfire like an injector driver or ignition coil failure first repair these problems then re-test system. If no trouble codes are present proceed to the next step.

Nov 24, 2010 | 2005 Chevrolet Colorado

3 Answers

My 91 oldsmobile 98 runs rough in idle but when driving run smooth.


Rough idle is a very common problem on 4 cylinders, but I believe the 98 Regency has a 6 cylinder in it, right?

Sometimes the coil packs get iffy, and sometimes the EGR Valve gets a leak in it causing a rough idle.

When the accelerator pedal is depressed, it can change things so that the engine seems to run smoothly.

However, I would look for codes to see if anything intermittent is occurring in the engine that may need attention.

The OBD-I scanner can help to diagnose the problem, if anything is out of specifications on the engine in question.

The owner will have to find a technician that has such a scanner.

Aug 29, 2010 | 1991 Oldsmobile Ninety Eight Regency

1 Answer

1994 nissan altima rough idol when stoped runs


My 1994 Altima has always had rough idle but runs smooth. I now have 176,000 miles on it and drive it daily. Best car I ever owned. I wouldn't let the rough idle bother me.

Jul 28, 2010 | 1994 Nissan Altima

1 Answer

Running roug at low idle, smooths out at 2500 rpms


change plug and wire if its been a while most cars have 90000 miles platinum plugs in them.but the wires wear before plugs.so change plugs and wires.+clean fuel injectors .change fuel filter and air filter.if car still run rough your idling to low.have idling check .

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1 Answer

1991 VW Cabriolet runs rough during idle


Check the hose between the inletmanifold and the pipe to the brakeservo it normally gets old and a crack in so the engine sucks false air on cylinder 4, causing engine to run rough or uneven.

Mar 01, 2009 | 1991 Volkswagen Cabriolet

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