U1891 CADILLAC - Hybrid Control Module Lost Communication With Instrument Panel Cluster
U1891 CADILLAC Possible Causes
- Faulty Instrument Panel Cluster (IPC)
- Instrument Panel Cluster harness is open or shorted
- Instrument Panel Cluster circuit poor electrical connection
- Faulty Hybrid Control Module (HCM)
How is the U1891 CADILLAC code repair?Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
What is the cost to diagnose the U1891 CADILLAC code
Labor: 1.0The cost to diagnose the U1891 CADILLAC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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- Engine Light ON (or Service Engine Soon Warning Light)
U1891 CADILLAC MeaningModules connected to the class 2 and high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The Diagnostic Trouble Code (DTC) is reported on a class 2 link to the scan tool by Powertrain Control Module (PCM) even if they may be set by different modules. The DTC will set when a node alive message has not been received from an identified module within the last 5 seconds after establishing class 2 serial data communication, or a supervised high-speed GMLAN message has not been received.
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