Does not start, no fire? P0920, P0921 and P0999 codes.

These codes and the fact that the engine will not start is telling us we need to check the fuses primarily.

Here is a guide to help please check the fuses with the key on:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

I can tell you I have seen the instrument cluster cause problems like this so if the fuses are good, it could be bad, we should do a complete CAN scan which is easy to do. 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

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

P0920 - Gear Shift Forward Actuator Circuit/Open: This code suggests that there's an issue with the electrical circuit associated with the gear shift forward actuator. This could be due to a faulty actuator, a problem with the wiring or connectors, or an issue with the control module.

P0921 - Gear Shift Reverse Actuator Circuit/Open: Similar to P0920, this code indicates a problem with the gear shift reverse actuator circuit. It could be due to a defective actuator, wiring issues, or problems with the control module.

P0999 - Shift Solenoid "F" Control Circuit High: This code is a bit less common and might not be specific to the 1998 Dodge Durango. Generally, it indicates an issue with one of the shift solenoids, specifically the "F" solenoid.

So, I assume the engine is cranking over but not running is this correct? Please go over this guide and get back to us.