Question on Voltage

[ACoyle]

It has been quite cold for NJ (!7 degrees and a lot of wind). My truck has been sitting a lot.



I had to take a trip last week and while out on the highway The truck popped a code. It was TPS over voltage. It was within 15 minutes of starting out. When it did it bucked a bit. I cleared the code and finished my trip without INcedent. When I got where I as going the truck again sat in the cold and high wind again. It did the same thing starting out going home again.



I cleared the code and reset the ECM to stock software. It has behaved since. The only thing that I do note is the dashboard volt meter appears to be reading high. I removed the battery cables and cleaned the terminals. I measured the battery voltage 12. 85 on one and 12. 65 on the other, disconnected. I put it back together and started the truck and drove around the block. Imeasured the voltage idling. 14. 85. Is this too high?



Any thoughts or input would be appreciated.



Andy

 

[Wingate]

14. 8v shouldn't be too high. Is the TPS a 12v supply sensor? I guess I always figured it was probably a 5v, or 8v sensor... . Although I've never experienced these problems so I haven't had to investigate it yet... (knock on wood)

Over voltage kinda sounds like a broken wire or a lost ground.

 

[ACoyle]

One of the battery grounds was kind of dirty. I am hoping for the best.

 

[TCDiesel]

Your voltage is link to ambient Temp the colder ambient the higher the voltage,Make sure all your batteries connections are good tight,clean,or you will overcharge the rider side battery and it will exploded,Generally the gage will show low voltage before this happens 11-13v. . 14-15v charging is normal in 10* or colder.