Standard U Codes

U1147 and U1451 Antitheft and Alarm Systems. Testing and Inspection

U1341 Heating and Air Conditioning. Testing and Inspection

The following codes can be found under A L L Diagnostic Trouble Codes ( DTC ). Testing and Inspection

U1020
U1021
U1039
U1051
U1073
U1135
U1451
U1850
UXXXX