Boost gauge on DD15

[Rawze]

(02-23-2018 )uncleal13 Wrote:  The engine ecm requires this to be left alone, it needs it for its own use.
The data to read from this sensor is available on the J1939 data bus.
The fastest and cheapest way to read it would be to purchase a ScanGauge D. It will show boost and many other gauges that are on the databus.
https://www.scangauge.com/products/scangauge-d/
You could also just get a boost gauge from Freightliner, they just plug into the gauges databus daisy chain. But it may require the dealer to activate the gauge.

I don't recommend EITHER of these solutions if you want acurate readings. There is much lag (almost 3+ seconds), it masks spikes and cavitation issues, and it is also not always accurate depending on how old the engine sensor is.

An after-market glowshift or other brand of boost gauge is my choice. They are much more responsive and will show you things the factory gauges cannot.