It sounds like the car is going into limp mode, I would do a CAN scan which will go over all systems in the car. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.
Here is a video to show you how:
https://youtu.be/u-4syLc-ifQ
I have seen a bad PCM cause this issue, there should be more codes and if not, I would try a rebuilt PCM you can get a preprogrammed unit by searching Google or Ebay. Here is the location and how to change the unit out.
Disconnect and isolate the negative battery cable.
Remove the cowl plenum cover/grille panel from over the wiper module (Refer to 23 - Body/Exterior/COVER, Cowl Panel/Removal) .
Remove the Powertrain Control Module (PCM) retaining bolt (1).
Disconnect the PCM electrical connectors (2).
Remove the PCM (3) from the vehicle.
If required, remove the noise plug (3) from the PCM (4).
If required, remove the PCM mounting bracket (1) retaining nuts (2) and remove the bracket.
INSTALLATION
If removed, position the Powertrain Control Module (PCM) mounting bracket (1) onto the PCM (4), install the two retaining nuts (2) and tighten to the proper (Torque Specifications) .
If removed, install the noise plug (3) onto the PCM.
NOTE:
Prior to reconnecting the electrical connectors to the PCM, check the pins in the electrical connectors for misalignment and/or damage. Repair as necessary.
Position the PCM (3) into the vehicle.
Connect the PCM harness connectors (2).
Position the PCM bracket to the cross support, install the retaining bolt (1) and tighten to the proper (Torque Specifications) .
Install the cowl plenum cover/grille panel over the wiper linkage module (Refer to 23 - Body/Exterior/COVER, Cowl Panel/Installation) .
Connect the negative battery cable.
NOTE:
If a new PCM is installed, it must be programed with the original Vehicle Identification Number (VIN) and mileage. If this is not done, a Diagnostic Trouble Code (DTC) may set.
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Saturday, March 30th, 2024 AT 10:44 AM