Sure it's possible - Do an experiment to see if your analog meter is reading correctly. Re-run your code reading procedure with key in position "2" (ignition on) but this time don't have the engine running. Using your meter you should be able to read the code for "faulty engine speed sensor" - I think it's code 7 if my memory is correct. The ECU throws this code because it can't detect an engine RPM reading since the engine is not running.