wow, looks like a Santa's christmas list who is naughty or nice.I've got the same RAV, just rolled over to 60,000 miles.
So, according to the service manual, a P0300 is:
Random / Multiple Cylinder Misfire Detected
Some causes may be:
1. Open or short in engine wire harness
2. Connector connection
3. Vacuum hose connection
4. Ignition system
6. Fuel pressure
7. MAF meter
8. ECT sensor
9. Compression pressure
10. Valve clearance
11. Valve timing
12. PCV valve and hose
13. PCV hose connections
14. Air induction system
Supposedly the list is sorted with the most probable causes first. So, chances are it's not the stuff at the bottom. This link might be helpful:Thanks, JuneBug! Would you recommend just going down the list and researching the diagnostics for each?
Yes, they are in the panel just to the left of the steering column. In the picture, you can see 2 of these fuses above the pink relay:Also, checked all fuses under hood and under the dash next to OBDII port.
The cover plate for the under dash fuses shows x3 30 Amp fuses that are not with all the other smaller fuses. Anyone know where these x3 30 Amp fuses are?