DTC C1237: Primary Pressure Sensor-Signal: DTC Detecting Condition

WARNING: This page is about a different car, the 2010 Hyundai Genesis Coupe. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Possible cause
DTC Strategy	Voltage Monitoring	External noise. Faulty pressure sensor
Enable Conditions	If input signal is noisy, Which the gradient of the sensor signal is larger than predefined value for specific times, ECU detect the failure. Outside an ABS/ESC control, And after normal operation of BLS, If the pressure sensor signal is higher than 20bar and BLS is low for 3sec, ECU detect the failure.
Fail Safe	Inhibit the ESC control and allow the ABS/EBD control. The ESC warning lamp is activated.