Why is my Lexus CT 200h misfiring or running rough? This Lexus CT guide is based on 1 documented technical case, including 1 confirmed successful repair outcome. It summarizes the captured evidence without assuming every vehicle with a similar symptom has the same cause. Documented applicability includes 2014.
What Drivers or Technicians Reported
Documented complaints included: Engine runs rough when cold, smooths as it warms, and MIL is on..
Fault Codes Seen in Supporting Cases
Codes included P0301. A code is a diagnostic clue, not automatic proof that a specific part failed.
Causes Confirmed in Documented Cases
Failing head gasket causing the cylinder-1 cold misfire.
What the Diagnostic Process Found
Misfire confirmed on cylinder 1 Misfire remained on cylinder 1
Repairs That Corrected Documented Cases
Replace head gasket
Repairs or Attempts That Did Not Solve the Original Problem
Swap/replace-test ignition coil — unsuccessful Swap/replace-test spark plug — unsuccessful
Lexus CT Diagnosis in Hickory, NC
Mich's Foreign Cars has served Hickory and the surrounding Western North Carolina area since 1983. We specialize in European and foreign vehicles and use professional diagnostic equipment to identify the cause before recommending repairs. If your Lexus CT is showing this symptom or fault pattern, call Mich's Foreign Cars at 828-324-6012 to schedule diagnosis.