Lexus RX 350 electrical warnings, communication faults, and wiring diagnosis This Lexus RX guide is based on 2 documented technical cases, including 2 confirmed successful repair outcomes. It summarizes the captured evidence without assuming every vehicle with a similar symptom has the same cause. Documented applicability includes 2013–2016.
What Drivers or Technicians Reported
Documented complaints included: MIL on, limp mode and no throttle response.; Parking-assist malfunction warning and C1AEC after collision repairs that included new front sensors and harness..
Fault Codes Seen in Supporting Cases
Codes included P2118, C1AEC. A code is a diagnostic clue, not automatic proof that a specific part failed.
Causes Confirmed in Documented Cases
Blown ETC fuse, with marginal ground circuit also repaired. IPAS module setup/initialization not completed after repair.
Repairs That Corrected Documented Cases
Repair marginal ground and replace ETC fuse; road test. Initialize and calibrate IPAS module at dealer
Lexus RX 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 RX is showing this symptom or fault pattern, call Mich's Foreign Cars at 828-324-6012 to schedule diagnosis.