Check 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.
The cost of diagnosing the U2021 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
The Diagnostic Trouble Code (DTC) will set when an invalid or fault data received from a Control Module.
Need more information on how to fix the U2021 code? Get Access to Factory Service Manuals
Get the U2021 code diagnosed by a professional: Find a repair shop in your area
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