OK, I went for the 1st service and now my rig is stalling all the time. It stalled maybe twice in the first 20 hours. The dealer says it's probably the TPS (throttle position sensor) needs to be reset. Can I do this on my own? The dealer is 30 minutes away and I'm too busy to drop during the week and leave it for an hour or so. Just looking for a clue as always and you're advice is always appreciated.