Lexus CT 200h engine controls concern: symptoms and diagnosis 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 2013.
What Drivers or Technicians Reported
Documented complaints included: MIL and oxygen-sensor circuit codes returned after owner-installed sensors..
Fault Codes Seen in Supporting Cases
Codes included P0038, P2238, P2239, P2253. A code is a diagnostic clue, not automatic proof that a specific part failed.
Causes Confirmed in Documented Cases
Aftermarket A/F and HO2 sensors were not sufficiently compatible/accurate.
Repairs That Corrected Documented Cases
Replace both sensors with OE parts
Repairs or Attempts That Did Not Solve the Original Problem
Owner-installed aftermarket A/F sensor — unsuccessful Owner-installed aftermarket HO2 sensor — 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.