Common Causes of a 2015 Dodge Journey Check Engine Light
On the 2015 Journey (2.4L or 3.6L engines), the MIL typically illuminates due to EVAP leaks (P0456), misfires (P030x), thermostat issues (P0128), throttle correlation faults (P2110/P0123) or transmission adaptives/solenoids (P0700 + subcodes). Scan for codes, diagnose the subsystem—smoke-test EVAP, swap coils, replace thermostat, clean throttle body, check ATF level—then clear the light with a scan tool after confirming the repairs.
Finish with a mixed drive cycle to reset readiness monitors and ensure no new codes appear.
Need more detail? Read the Journey CEL guide.