DTC P050B: Cold Start Ignition Timing Performance: Description
This monitor will run when the engine is started at an engine coolant temperature of-10 to 60°C (14 to 140°F). The DTC will be set after the engine idles for 13 seconds (2 trip detection logic)
The DTC is designed to monitor the ignition timing at cold start. When the engine is started at an engine coolant temperature of lower than 60°C (140°F), the ECM checks the ignition timing at engine idling. If the ignition timing advances beyond the specified level within 10 seconds, the ECM interprets this as a malfunction. The MIL is illuminated and a DTC is set when the malfunction is detected in consecutive driving cycles (2 tip detection logic).
NOTE:
When the negative battery terminal is disconnected during inspections or repairs, the ISC (Idle Speed Control) learning values are cleared. This DTC cannot be set with the ISC learning values cleared.
DTC DETECTION CONDITION CHART
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P050B | Insufficient ignition timing retard at cold start (2-trip detection logic) |
|