Tuesday, January 18, 2011

How to Check a Trouble Code P0237?

How to Check a Trouble Code P0237?

Model: Hyundai Auto

Gasoline : Diesel

How to  Check a Trouble Code P0237?

 

P0237 Boost Press. Sensor - Circuit Low Input

 

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Study Guide and Component Location

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Study Guide and General Description

Study 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. Study 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. Study 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.

Study Guide and DTC Description

Study P0237 is set when the voltage below 0.2V - mimimum output voltage of BPS - is detected for more than 2 sec.. Study This code is due to open in power circuit or short to ground in signal circuit.

Study Guide and DTC Detecting Condition

Item

Detecting Condition

Possible Cause

 

DTC Strategy

Study

Voltage monitoring

BPS circuit

BPS component

Study

Enable Conditions

IG KEY "ON"

Study

Threshold Value

Output signal below minimum value(below 200mV)

Study

Diagnostic Time

2 sec.

Study

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

Diagnostic Circuit Diagram

Signal Waveform & Data

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Fig1). This is the waveform of BPS as accelerating from idle state. Signal voltage rises as accelerating.

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