3450e3f2__WJ___Diagnostic_Trouble_Codes__ion_of_Diagnostic_Trouble_Code
[Scan Code] P0139 (M) [DRB Scan Tool Display] OS Sensor Circuit Slow Response (Bank 1 Sensor 2)
Oxygen sensor response not as expected.
Jeep Grand Cherokee WJ - Diagnostic Trouble Codes
Description of Diagnostic Trouble Code