Camshaft position sensor.

Normally the Cam Position Sensor can cause other erroneous errors. It could be tested with a volt meter to ensure it's functioning properly. Quite a simple test. If you can't do that, the sensor is cheap, I'd replace it first.

If this is a coil on plug configuration, you might want to test your ignition coils. This can be done several ways. Remove the coils one at a time and check the resistance across the primary and secondary windings. Then you can test coil output with a coil tester available at the parts store. One bad ignition coil can cause this problem and "false" codes to set in the computer. I would be inclined to clear all the codes and see what comes back. Good Luck codes