DESCRIPTION:
Selective Catalyst Reduction (SCR) inlet temperature high.

MONITORED PARAMETER:
SCR inlet temperature.

TYPICAL ENABLING CONDITIONS:
Non-regen mode

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
Two seconds

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 25%

NOTE: If code 3246-15 active, fix that first.

PROBABLE CAUSES:
1. Inspect all connectors and wiring upstream of the ACM (SCR inlet temp, ATD harness 10-pin connector, VIH 47-pin connector, and ECM 120-pin connector).
2. SCR inlet temperature sensor.
3. SCR inlet temperature sensor connector/harness.