Repair The Symptom
WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
When the step-by-step troubleshooting checks find a fault, perform the proper repairs. Make sure to fix the root cause of the symptom, not just the symptom. Just fixing the symptom, without fixing the root cause, will cause the symptom to eventually return.