Details On DTCs

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P2635: 00 (PCM (PYUL)) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Fuel transfer function malfunction
Detection condition	Determination conditions	After the vehicle is sufficiently fueled, the PCM detects that fuel in the fuel tank (sub) does not decrease and only the fuel in the fuel tank (main) decreases continuously for the specified number of times.
	Preconditions	1 min have elapsed after the ignition was switched ON (engine off) The following DTCs are not detected: P0461: 00, P0462: 00, P0463: 00, U0129: 00 or U0140: 00 Low-G sensor (integrated with SAS control module) signal is normal A condition in which a G (load) of the specified value or more has not been applied to the vehicle continues for the specified time.
	Malfunction determination period	Not applicable
	Drive cycle	2 * *: Because the PCM monitors the fuel decrease transition after the vehicle is sufficiently fueled, two or more drive-cycles may be necessary to store a DTC depending on the driving conditions.
	Self test type	CMDTC self test
	Sensor used	Low-G sensor (integrated with SAS control module) Fuel gauge sender unit
Fail-safe	Not applicable
Vehicle status when DTCs are output	If the fuel tank (main) becomes empty, rough idling, poor acceleration, and engine stalling occur.
Possible cause	Fuel system (low pressure) malfunction Battery voltage decrease Fuel pump unit malfunction Fuel filter (high pressure) clogging (integrated with fuel pump unit) Fuel filter (low pressure) clogging (integrated with fuel pump unit) Pressure regulator (built-into fuel pump unit) malfunction Jet pump malfunction (integrated with fuel pump unit) Fuel tank malfunction Clogging in hose between fuel tank (main) and fuel tank (sub) Disconnected hose between fuel tank (main) and fuel tank (sub) PCM malfunction