OBD-II Diagnostic Trouble Code
P0638
Electronic Throttle Control Circuit Performance
P
Powertrain
engine / trans
engine / trans
0
Generic
SAE standard
SAE standard
6
Computer & output circuits
38
Electronic Throttle Control Circuit Performance
Severity · general guide
Moderate
Fix soon — usually won't strand you
Code type
Jeep
System
Powertrain
Model
Grand Cherokee
Years
2011