Cm871 codes 2961 2764 4214

[JetHauling]

e the exhaust gas pressure sensor for sure and check that the tube feeding it is clear.
If the IMAP was blocked that bad, so is the Delta P, the one with two tubes on the intake manifold, that will cause the "burp" as you call it. I call it a snort or cough.
To clear the 4214 code you need to do a DOC maintenance reset with insite.
Also need to compare ambient air temp and barometric pressure readings are accurate.


I changed the pressure tube because I had one lying around in the packaging
The delta p is the two hard tube in the intake side? If so I cleans them when I cleaned the egr on the intake side