OBD-II Diagnostic Trouble Code
P1D4D
Internal Control Module Rail Pressure Plausibility Error
P
Powertrain
engine / trans
engine / trans
1
Mfr
manufacturer code
manufacturer code
D
Powertrain subsystem
4D
Internal Control Module Rail Pressure Plausibility Error
Severity · general guide
Moderate
Fix soon — usually won't strand you
Code type
Jeep
System
Powertrain
Model
Grand Cherokee
Years
2011