C1237 Primary Pressure Sensor-Signal: DTC Detecting Condition

Item	Detecting Condition	Possible cause
DTC Strategy	Voltage Monitoring	Open or short of pressure sensor circuit Faulty pressure sensor Faulty HECU
Monitoring Period	After Pressure sensor initialization. No under voltage No pumps are running. No BLS-signal is set.
Enable Conditions	The pressure sensor-offset value must be in the range of ± 15 bar. A failure is detected if this range is exceeded.
Fail Safe	Reduced function caused by faulty pressure sensor signal. Sensor failure outside the ABS control cycle Only the ABS/ESC functions are inhibited, allow the EBD. The ABS/ESC warning lamps are activated and the EBD warning lamp is not activated. Sensor failure inside the ABS control cycle Inhibit the ESC control, allow the EBD. The ESC warning lamps are activated. After the control, the ABS functions are inhibited. The ABS warning lamps are activated.