General Information

Engine Control
P050B Cold Start Ignition Timing Performance - General Information

Component Location





General Description

ETC keeps 1,450 RPM by retard of ignition timing in order to activate the catalyst converter under the condition that engine off time is over than 8 hour and coolant temperature is lower than 77°F.
If ETC can't keep the RPM as much as target RPM in catalyst heating range, it generates torque by throttle opening so that it keeps target RPM.

DTC Description

ECU shows P050B when ignition retard doesn't work even if ETC would activate retard of ignition timing by throttle opening for catalyst heating.

DTC Detecting Condition





Diagnostic Circuit Diagram





Signal Waveform & Data