This 2002 Buick Lesabre came in with the complaint that it was running real bad and service engine soon light was on. It ran so bad that the customer had it towed in rather than drive it in. A quick check of the codes and a P0205 and a P0443 were stored. The P0205 was for a fault with the number 5 injector so I figured that would be a good place to start my inspection. I removed the engine trim panel and the problem was quite evident. Rats!!!!
If you click on the picture below and enlarge it you will see that the injector wiring is badly chewed and you might even see the chewed wires going to the EVAP canister purge solenoid (probable cause of the code P0443)
The rat was trying to build a nest on the back side of the engine.
After vacuuming up the debris, I installed a new harness connector for the #5 injector and repaired the wiring for the EVAP canister purge solenoid.
Taped the harness up and plugged in the harness connectors. After clearing the codes and a quick test drive this one was done.