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 the voltage above 4.9V - maximum output voltage of BPS - is detected for more than 2 sec.. This code is due to 1) short to battery or open in signal circuit or 3) open in ground circuit.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

● Voltage monitoring

● BPS circuit

● BPS component

Enable Conditions

● IG KEY "ON"

Threshold Value

● Output signal above maximum value(above 4.9V)

Diagnostic Time

● 2.0 sec.

Fail Safe

Fuel Cut

NO

● Boost pressure is fixed at 1000 hpa.

EGR Off

YES

Fuel Limit

YES

Check Lamp

OFF

Specification

Pressure [Kpa]

20

100

190

250

Outpur voltage [V]

0.4±0.077

1.878±0.063

3.541±0.063

4.650±0.077

Schematic Diagram
note
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Signal Waveform
Яндекс.Метрика