DTC Detection Logic

ECM controls fuel injection timing and fuel injection quantity when engine is started with the engine cold.

This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.

NOTE:

If DTC P1423 or P1424 is displayed with other DTC, first perform the trouble diagnosis for other DTC.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1423

COLD START CONTROL

(Cold start emission reduction strategy monitoring)

ECM does not control fuel injection timing properly when engine is started with the engine cold.

ECM

P1424

COLD START CONTROL

(Cold start emission reduction strategy monitoring)

ECM does not control fuel injection quantity properly when engine is started with with the engine cold.