i was driving on the highway today and hit an unexpected and unseen pothole. Immediately after hitting it, the engine stumbled as if losing all power for a second and then came back as if nothing had happened. I continued on my way, but paying attention to how it was running. Aside from smelling a little rich when accelerating, nothing seemed out of the ordinary.

When i went to start her back up, I had a CEL. Pulling the codes I was greeted with more codes than I thought could be possible.

P0102
P0135
P0139
P0141
P0154
P0155
P0159
P0161
P0340
P0414
P0445
P0448
P1451
P1482
P1884

I am thinking the pothole jarred something lose just long enough to fry most of the computer, but kept it alive enough to keep it running in "limp home mode"

 

maybe you knocked a ground lose. Battery terminals lose. Check all your wiring. I bet something is loose. Maybe even at ecu plug

 

Update

Years ago when i first bought my disco, I had the engine replaced with a tophatted engine. the guy who did the work did a half arsed job that required me to do a lot of little repairs. This was one of them. The knock loosened the harness to the forward right O2 sensor. One of the wires welded itself to the exhaust manifold and popped fuse F2. This took out half of the engine management system. Once I made that small repair, tidied the harness back up where it belongs, and cleared the codes, all is well. As I had the solder shrink tubing, and wire ties already, all this actually cost me was two 15a fuses.