U Codes

Symptom Chart

NOTE: Network DTCs may be set by an error or communications failure in the network. Individual DTCs are in the table, alongside their respective modules, but may also be set by a combination of factors affecting the network, which would result in multiple DTCs being set for one error, or, as in the case of an open circuit, no DTC being set.

DTC P1573 - P1642:

DTC P1643 - P1799, U1041 - U1147:

DTC U1262 - U2202:

DTC U2202 - U2613:

DTC U2614 - None:

Power and Ground circuit test index










Modules may log DTCs if the power supply or GROUND is interrupted. Supply and GROUND tests are covered below by module name.