Codes P0700 and P0038, TCM/PCM location needed

KEN HARLSON

MEMBER
2005 DODGE NEON
2.0L
4 CYL
2WD
AUTOMATIC
180,000 MILES

I have a P0700 code along with P0038. I would like to know the location of the TCM/PCM so that I can replace it.

Friday, June 5th, 2020 AT 5:04 PM

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,645 POSTS

Hi,

The P0038 is related to an oxygen sensor (heated) issue. The P0700 is a generic code. All it is telling you is there is a code stored in the transmission control module. You need to retrieve that code to determine what is happening. Replacing the TCM is a last resort. See pic 1 for a better description.

Now, most general scan tools can't read transmission codes. That is why the P0700 exists. It indicates there is a code stored. Can you tell me what is happening? Also, the two codes you indicated are likely not related.

As far as location, the TCM is actually housed in the same case as the PCM. It is located on the left front corner below the air filter box.

If you can, try to have the TCM code identified. Chances are the module isn't the problem.

Let me know.
Joe

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Friday, June 5th, 2020 AT 9:29 PM

KEN HARLSON

MEMBER
2 POSTS

Hi Joe.

Sorry for the late reply. I also get a P0303 code occasionally after driving for a bit. The engine sputters terribly under acceleration from a stop or going up a long hill. On ramps are a nightmare! I also get what feels like engine surges while the transmission is in gear at a stoplight or stop sign.
On cool mornings my 40 mile commute to work is fairly uneventful. After the car sits all day in the sun it runs as described. I hope this information helps. I am looking to find someone who can read the TCM codes but no luck so far.

Thanks,
Ken

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Saturday, July 4th, 2020 AT 6:53 AM

JACOBANDNICKOLAS

MECHANIC
109,645 POSTS

Hi,

The P0303 indicates that cylinder 3 has a misfire. It's odd that it is random, but anything is possible.

You know, I'm sitting here thinking about this and the idea that heat seems to be a possible cause, I wonder if the crankshaft position sensor is going bad. This sensor can be affected by heat to a point that it can shut the engine down. The sensor is located below the starter. See pic 1.

Take a look through this link and let me know if there is anything in it that mirrors what you experience.

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Let me know.
Joe

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