Originally Posted by acapital

Update checked the resistance of the OSS from C103. It read about 1.1Kohm. Reconnected C103. This resistance is consistent with the now spare sensor I have. While I had the batteries disconnected I decided to check them as I had a batt low voltage earlier. One of the batteries checked good with the load tester. The other battery dropped off badly when load tested. I had a spare battery, slightly smaller, which was used for something else, it tested good so installed it. Started the truck and proceeded to do everything which caused the fault to appear earlier but this time no fault. Up hill down hill revving from standstill, revving in park....no fault. I remember reading someone having an issue with an alternator causing this to generate the fault. I will drive the truck to town today and see how it goes, and get a new battery, maybe both just to be safe.