How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Buddy Your Own Question
Buddy, Technician
Category: Heavy Equipment
Satisfied Customers: 730
Experience:  25 years experience
Type Your Heavy Equipment Question Here...
Buddy is online now
A new question is answered every 9 seconds

cummins..check engine light came on and the fault code..odometer

Customer Question

We have a "07" model 9400i with an ISX 475 Cummins. The check engine light came on and the fault code on the odometer is (128-F04 PID027_A). Could you possibly inform me as to what this code pertains to?
Submitted: 7 years ago.
Category: Heavy Equipment
Expert:  Buddy replied 7 years ago.

Hi and welcome to JA. I am Buddy, and i will try and help you out.


This fault code is for a faulty egr valve. If the code is active, the egr valve must be replaced.


Fault Code: 2272
PID: P027
SPN: 27
FMI: 4/4
LAMP: Amber

EGR Valve Position Circuit - Voltage Below Normal, or Shorted to Low Source. Low signal voltage has been detected at the EGR position sensor circuit.


EGR valve actuation will be disabled.



I hope this helps you out. If you have anymore questions, just ask.