spn 157 fmi 18

[730Industries]

Looked at a truck today. Had this code. Took for a test drive and ran fine. Probably 30 minutes total for the drive. Hot on throttle at times. Didn’t lose power. Didn’t limp mod. Nothing. No stuttering either.

During original start up truck struggled to fire up which makes sense given this code reflects low fuel pressure. It did fire on the second try and ran smooth. No knocking. No stuttering. None of that.

Upon research this code can be related to fuel pump issues. However….. the truck just had all 6 injectors replaced. The shop doing it doesn’t have the software to calibrate them though. Could this be causing this code? Given they aren’t calibrated yet? I am not familiar enough with the fuel system. So someone else’s advice in this region would be appreciated.

There are receipts for all the work done for this. Including new injectors. Seller is taking truck from 3rd party shop to kenworth to have the injectors calibrated tomorrow. However I am 300 miles from the truck now, so no easy returning.

The fuel pump was replaced at 550 and truck has 860 on it now. I do understand this is getting to its replacement time. It was replaced with new style pump.

So I guess my question is, is this code purely attached to a fuel pump grenading? Or would the injectors be causing this as the haven’t been calibrated yet?

For reference engine is the cm 2350.
VIN: 1XKAD49X8ER385380

Thanks in advance.