TSB: REV1 WARRANTY INFORMATION HAS BEEN UPDATED. SOME 2011 – 2012 CT 200H VEHICLES MAY EXHIBIT A VIBRATION DUE TO ROUGH IDLE AND/OR TAPPING NOISE FROM HV TRANSAXLE AT COLD START. THE CHECK ENGINE LIGHT MAY ALSO ILLUMINATE WITH (DTC) P0401 (EXHAUST GAS RECIRCULATION FLOW INSUFFICIENT DETECTED). DUE TO EXCESS CARBON BUILD-UP AT THE VALVE ASSEMBLY, THE VALVE WILL STICK CAUSING THE ENGINE RPM TO FLUCTUATE. FOLLOW THE PROCEDURES IN THIS BULLETIN TO ADDRESS THIS CONDITION.
