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Terry @ BMS Terry @ BMS is offline
Posts: 32,153
Join Date: Jan 2008
Default 07-18-2019, 02:53 PM

Originally Posted by allanC
Hey Terry, so couple weeks ago installed JB4 updated to latest firmware set to map 1 ran for a couple hundred kms all good. Drove Calgary to Spokane, then Spokane back to Calgary for the weekend total of about 1500kms. When got back into Calgary engine light came on. Read code and came up as P0400. Did not delete fault, next day morning switched to map 0 turned off ignition and then restarted and engine light went out. Connected and fault still in in as P0400. Have an appointment tomorrow for the fault since I still have warranty and pulled the JB4 this evening. Is this going to be an issue with the truck or the JB4? I’m rolling up on 96,000kms and installed JB4 at 93,000kms. Let me know. Can run whatever tests you want me to with JB4 installed once I get the truck back from Ford tomorrow. Thanks!
I'm sure whatever it is is a false alarm code and not an indication of any actual mechanical issue. Just going to be annoying to delete or ignore the code until we're able to figure out the exact trigger and correct it for you.

I'm assuming it comes back even with the crank case pressure sensor replaced?

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