DTC P050B [LF]: Notes

DTC P050B (LF) DETECTION CONDITION AND POSSIBLE CAUSE

DTC P050B	Cold start ignition timing performance problem
DETECTION CONDITION	The PCM monitors actual ignition timing using the CKP sensor while electronic spark advance control fast idle correction operating. If the ignition timing is out of specified range, the PCM determines that the ignition timing at cold condition has performance problem. Diagnostic support note This is an intermittent monitor (cold start emission reduction strategy monitoring). The MIL illuminates if the PCM detects above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA (Mode 2/Mode 12) is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	CKP sensor related part malfunction Pulse wheel malfunction CKP sensor malfunction CMP sensor related part malfunction Pulse wheel malfunction CMP sensor malfunction PCM malfunction

DTC P050B

Cold start ignition timing performance problem

DETECTION CONDITION

The PCM monitors actual ignition timing using the CKP sensor while electronic spark advance control fast idle correction operating. If the ignition timing is out of specified range, the PCM determines that the ignition timing at cold condition has performance problem.

Diagnostic support note

This is an intermittent monitor (cold start emission reduction strategy monitoring).
The MIL illuminates if the PCM detects above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
FREEZE FRAME DATA (Mode 2/Mode 12) is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

CKP sensor related part malfunction
- Pulse wheel malfunction
- CKP sensor malfunction
CMP sensor related part malfunction
- Pulse wheel malfunction
- CMP sensor malfunction
PCM malfunction