2014 Ghibli petrol. Engine light on, went to dealer. Codes showed lean on both banks. Replaced injectors. Light reappeared after driving about 20 miles. More repairs, then headed back home. Light came on after 100 miles. Limped home 500 miles. Took it to local shop- Jim’s Fine Cars. Problem: I installed fancy oil-doused air filters, and they coated the air flow sensors, resulting in engine codes! My advice: don’t use fancy filters!