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.
P0237 is set when the voltage below 200mV - mimimum output voltage of BPS - is detected for more than 2.0 sec.. This code is due to short to ground in signal circuit.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy | ● Voltage monitoring | ● BPS circuit ● BPS component | ||
Enable Conditions | ● IG KEY "ON" | |||
Threshold Value | ● Output signal below minimum value(below 200mV) | |||
Diagnostic Time | ● 2.0 sec. | |||
Fail Safe | Fuel Cut | NO | ● Boost pressure is fixed at 900 hpa. | |
EGR Off | YES | |||
Fuel Limit | YES | |||
Check Lamp | NO | |||
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 |
