Standard U Codes

NOTE: The DTC U1073 can be generated by either the PCM or the EATC module, you must know which module is producing this code for proper testing.

U1256 Seats. Testing and Inspection

U1073 Electronic Automatic Temperature Control (EATC) module

Engine Coolant Temperature Signal Missing

CLEAR DTC. Ignition Switch in RUN. WAIT one minute. RETRIEVE Continuous DTCs. If DTC reappears in retrieved list, REFER to Diagnostic Trouble Codes

U1341 Electronic Automatic Temperature Control (EATC) module

Vehicle Speed Low Resolution Signal Missing

CLEAR DTC. Ignition Switch ON. WAIT one minute. RETRIEVE Continuous DTCs. If DTC reappears in retrieved list, Refer to Diagnostic Trouble Codes ( DTC ).

U1021, U1039, U1051, U1073, U1131, U1135, U1256, U1451