DTC P2123 Cadillac
Rain Sensor. Signal Missing
Rain Sensor. Signal Missing
Description
The upper electronic module (UEM) regularly checks the communication with the rain sensor module (RSM). A diagnostic trouble code (DTC) is stored If the rain sensor module (RSM) does not respond to a request from the upper electronic module (UEM). The diagnostic trouble code (DTC) can be diagnosed 20 seconds after the ignition is switched on. Diagnostic trouble code (DTC) UEM-0080 is not stored if UEM-0081 or UEM-0082 is stored.
Cause and Solution
Open-circuit in the power supply cable for the rain sensorShort-circuit to ground in the power supply cable for the rain sensorOpen-circuit, short-circuit to ground or supply voltage in the data cable for the rain sensorOpen-circuit or short-circuit to supply in the ground lead for the rain sensorContact fault on the sensor side and or control module sideDefective rain sensorDefective control module.
Video Guide
Diagnostic Info
- DTC Code: P2123
- Brand: Cadillac