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2001 Dodge Neon P1193 and P1390 Error Codes: Diagnosis and Fix Guide

Model: 2001 dodge neon Fault Code: P1193 Posted: 2014-07-28 19:47

The check engine light has come on in my 2001 Dodge Neon, and I've retrieved fault codes P1193 and P1390. I'm looking for clear guidance on how to diagnose and fix these issues. Can anyone confirm what each code means and provide step-by-step troubleshooting advice? I'd appreciate any insights into whether the issue is related to the intake air temperature sensor or timing belt, and if there are common fixes for this combination of codes in a 2001 Dodge Neon.

Related fault codes

P1193P1390

Comments (6)

Anonymous 2014-07-29 07:46

Hi Morellana, P1193 - Fault detected in the intake air temperature sensor. P1390 - Indicates that the timing belt has skipped one or more teeth. Did you obtain these fault codes using a professional garage or your own OBD2 scanner? In most cases, it's more cost-effective to use your own diagnostic tool, repair the issue at home, and then reset the codes with your scanner. Best regards, George

Anonymous 2014-09-09 13:59

I installed a 2001 Dodge Neon engine and transmission into a 2002 Dodge Neon body. It ran perfectly initially after installation. However, now the vehicle is stuck in limp mode and won't shift properly—showing codes P0725, P0700, and P1139. I've already replaced all input and output speed sensors. Do I need to install a 2001-specific TCM and ECM for this setup? Will the 2002 transmission control module (TCM) work with the 2001 engine? The codes came from the TCM, and I recently had a new ECM installed. I urgently need help getting the car back on the road—this vehicle has been in repair for eight weeks without progress. Any advice would be greatly appreciated.

Anonymous 2014-09-09 14:26

To clarify: The vehicle is a 2002 Dodge Neon body, with a 2001 engine and transmission installed. How long did the car run smoothly before the shifting issue began after the swap?

Anonymous 2014-09-09 16:20

Yes—the vehicle is a 2002 model. I installed the 2001 engine and transmission into it, and it ran very well initially. After moving the unit from the wrecked 2001 car to the 2002 body, it started fine but now refuses to shift out of drive or possibly into second gear. I've checked all wiring connections—everything appears intact. I'm just trying to confirm whether I need to use the original 2001 ECM and TCM from the donor vehicle. If not, what should I do? It's a 2.0L automatic transmission setup.

Anonymous 2014-09-09 17:31

Note: There are two engine options—1.6L and 2.0L—and two transmission types (40TE and 41TE). Additionally, there may be a transition from EATX to NGC control systems. In some cases, the TCM or ECM is integrated into a single PCM unit. I recommend using the original controllers that came with your installed engine. You might need to swap wiring harnesses to ensure compatibility. There's extensive research available comparing these different system configurations—consider reviewing those for full compatibility details.

Anonymous 2014-09-09 18:54

The car worked perfectly when we removed the original 2001 engine and transmission and installed them into the 2002 body. It starts and runs smoothly, but now it won't shift out of drive or possibly into second gear. I've been trying to fix this for two weeks with no success. I'm considering taking it to a Dodge dealership to get professional diagnosis—does anyone have experience with this issue? Any tips on how to resolve the shifting problem would be very helpful.