Hi, just read your thread regarding your type-R. I would firstly use a Oscilloscope to check the output signal from the cam sensor is correct. I would check this straight out the back of the sensor and also at the ECU input terminal. Also check for any noise (unwanted electrical signal) in the wires. Check the air gap and rotor to make sure there is not physical damage to the wheel the sensor reads off. If the both the crank and cam sensor show faults, your bump might have physically damaged something by pushing the drive shaft into the box......only a wild stab in the dark but possible! Both the cam and crank sensors can be checked at the same time using a scope and this will tell you if the engine is operating correctly or if it is out of phase. Meaning, viewing the waveforms of both sensors might indicate a physical problem with the cam/crank timing.

Other then that, It would be worth checking the wiring / connection blocks around the vehicle.