8483726-8483721-8483756-8483761-8483766-8483716-8483736

Component Location

General Description

Boost Pressure Sensor(BPS) is installed in intake manifold and senses the pressure of air inside of intake manifold which is compressed by turbo charager.

Measuring mass air flow accurately with the information of intake mainfold pressure, mass air flow and intake air temperature, ECM performs actuating correction of EGR and VGT.

When excessive intake manifold pressure is detected, engine power generation is limited to protect engine because too highly compressed pressure due to turbo charger may harm engine.

DTC Description

P0238 is set when BPS output voltage is higher than maximum value (4900mV) for more than 2 sec.. This code is due to 1) short to battery / open in signal circuit or 2) open in ground circuit.

DTC Detecting Condition

Item	Detecting Condition			Possible Cause
DTC Strategy	• Voltage monitoring			• BPS circuit • BPS
Enable Conditions	• IG key ON
Threshold Value	• Output voltage is higher than maximum value (4900mV). - Short to battery in signal circuit. - Open in signal circuit - Open in ground circuit.
Diagnostic Time	• 2 sec.
Fail Safe	Fuel cut	NO	• -
	EGR Off	YES
	Fuel Limit	YES
	Check Lamp	ON

Specification

Pressure[Kpa]	32.5	70	140	210	270	284
Output voltage[V]	0.5	1.02~1.17	2.13~2.28	3.25~3.40	4.20~4.35	4.5

Diagnostic Circuit Diagram

note

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Signal Waveform & Data

Fig.1) The waveform of BPS signal as accelerating from idle state. Signal voltage rises as accelerating.