DTC P0234-00; Dynamic pressure turbo (DPT) overboost condition: Notes

NOTE:

To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".

Details On DTCs

DESCRIPTION	Dynamic pressure turbo (DPT) overboost condition
DETECTION CONDITION	Determination conditions	As the result of comparing the actual air charging pressure with the limited pressure, the actual air charging pressure exceeds the limited air charging pressure for a continuous 2 s.
	Preconditions	2 s have elapsed with all of the following conditions met when DPF regeneration control is stopped during boost control feedback. Engine speed: 500 rpm or more The following DTCs are not detected: Boost pressure sensor: P0237:00, P0238:00 BARO sensor: P2228:00, P2229:00
	Drive cycle	2
	Self test type	CMDTC self test
	Sensor used	MAP sensor
FAIL-SAFE FUNCTION	Limits intake air amount. (Only period of time when PCM determines that air is excessively boosted)
VEHICLE STATUS WHEN DTCs ARE OUTPUT	Not applicable
POSSIBLE CAUSE	Erratic signal to PCM MAP sensor signal malfunction Input signal part connector or terminals malfunction Input signal part related circuit malfunction Vacuum piping or positive pressure piping of wastegate valve actuator malfunction Air bypass valve malfunction Wastegate valve position sensor malfunction Wastegate valve actuator malfunction Dynamic pressure turbo (DPT) malfunction PCM malfunction