LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2012 >> Regal Base >> Repair and Diagnosis >> Engine Performance >> System >> Data Communications System >> Diagnostic Information and Procedures >> DTC U2099 >> Diagnostic Fault Information
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Serial Data Communication Enable U2099, U0100-U02FF1 U0100-U02FF U0100-U02FF2 -
1 Vehicle will not start.
2 History only. If cleared the DTC will return after several ignition cycles.