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Dodge Neon DTCs 11 And 43

Q. Hi, glad to find some professional help. I have a 1995 Dodge Neon 2.0 liter engine automatic transmission and 160,000 kilometers. This car had the Check Engine Light on and the codes are 43 and 11, also indicates some problem with the main coil to the computer. The car runs very well until I get it on the highway.

Dodge Neon DTCs 11 And 43

The engine light comes back on, they keep clearing the code and the same comes back, The car starts to buck real bad and eventually starts to stall. I then pull it over to the side of the road and put it in PARK. The engine then starts to rev up and down, by itself. Gets louder and louder, so I shut it off.

When you are driving it, it has a tendency to accelerate on it's own. I then wait on the road for about ten minutes, start it again and limp home. This is scary. The mechanics here, small town, seem to be confused. They are considering replacing the crank sensor, oxygen senor, checking some hose a valve to the intake manifold, cleaned them, checked for vacuum leaks. They also checked the fuel pump, which was changed two years ago with the fuel filter. Seems fine.

If you have any information to help, I would appreciate some help. It is Wednesday March 17th. I would like to get some info before Friday, prior to them replacing a whole lot of parts that maybe don't need to be fixed.

I'm a single Mom and know a very limited amount of mechanics. Can you help me? I hope I have sent enough information.

Thanks for your time,
Delphine

A.

Delphine, what a beautiful name. Well, I will do the best I can to help you.

P codes, in this case, would be more informative and precise then the self-diagnostic codes revealed by the manual method. Code 11 can be three different things:

  • 11 - No crank reference signal at the Powertrain control Module (PCM).
  • 11 (P1390) - Timing belt skipped one tooth or more.
  • 11 (P1391) - Intermittent loss of Camshaft Position Sensor (CMP) or Crankshaft Position Sensor (CKP).

Code 43 can be eight different things:

43 - Charging System Voltage High. 43 (P0300) - Multiple Cylinder Misfire. 43 (P0301) - Cylinder #1 Misfire 43 (P0302) - Cylinder #2 Misfire 43 (P0303) - Cylinder #3 Misfire 43 (P0304) - Cylinder #4 Misfire 43 (P0351) - Ignition Coil #1 Primary Circuit 43 (P0352) - Ignition Coil #2 Primary Circuit

As you can see, a scan tool would be more revealing. From the codes you supplied the problem could be a bad CMP, CKP, one, or both, coils. However I feel the best possibilities is either the CMP or CKP. I think spending an hours diagnostic time at a Dodge dealer will save you money in the long run.

There are, also, several Technical Service Bulletins that address these codes that you local mechanic will not have access to.

I'm sorry I couldn't get to your question sooner, but I have to answer them in the order they come in to be fair to everyone. I hope you understand.

Additional Information provided courtesy of AllDATA

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