My son borrowed my truck to take some stuff to southern California & on the way there the check engine light came on. THere were no other symptoms (No white smoke, no dead throttle etc. ) He had the light checked out at an auto parts store & it revealed a P0216 code "Injection timing control circuit malfunction" he said that there was another code but they were unable to retrieve it. The code was cleared & the light has not came back on after approx. 40 miles or so. but he still has the trip back to No. Calif. The truck is a stock 2002 2500 with approx. 95000 miles on the odometer. I've started searching past posts & looking at past issues of the TDR. I don't have a fuel pressure gauge on it but am seriously considering it. Any thoughts. Thanks in advance