1230 code(s) in this category. Page 45 of 52. Select one to see the detailed diagnosis.
Red (U)
Generic fault on the control module itself — internal self-diagnostic flagged a problem with computation, memo…
The control module did not complete its shutdown sequence cleanly — power was lost before housekeeping (saving…
The control module reports a problem with the stored Vehicle Identification Number (VIN) — missing, mismatched…
The control module detected battery voltage outside its acceptable operating window. Either too low (drained b…
Fault on the accessory power relay that switches power to comfort/accessory loads (radio, infotainment, etc.) …
Fault on the retained accessory power (RAP) function that keeps comfort loads (windows, radio) powered for a s…
Open circuit on the input power line A of the control module. The module is missing or losing its main supply …
Open circuit on input power line B of the control module (second supply rail, e.g. permanent +12V vs switched …
The control module detects a problem on its ground reference A — open ground, high resistance to chassis, or f…
The control module detects an inconsistent or implausible ignition switch state — multiple positions reported …
Fault on the combined ACC/ON/START ignition input line of the control module. A communication loss with this m…
Fault on the OFF/ON/START ignition input line. A communication loss with this module breaks any function relyi…
Fault on the ON/START ignition input line — module sees inconsistent ON or START signal. A communication loss …
Fault on the ignition ON input — module does not see ON state when other inputs say ON, or vice versa.…
Fault on the ignition ACC (accessory) input. A communication loss with this module breaks any function relying…
Fault on the ignition START input — module does not see start request when cranking, or sees one when not cran…
Fault on the ignition OFF input — module does not detect OFF state correctly. A communication loss with this m…
The control module did not wake up cleanly from sleep mode — wake event timing or sequence outside spec.…
Open circuit on input power line C of the control module (third supply rail, e.g. for redundant power on safet…
Open circuit on input power line D of the control module (fourth supply rail). A communication loss with this …
Fault on the third ground reference of the module. A communication loss with this module breaks any function r…
Fault on the fourth ground reference of the module. A communication loss with this module breaks any function …
The control module's internal timer or clock has drifted or stopped — affects time-stamped diagnostic events, …