DESCRIPTION:This code sets when the selective catalytic reduction (SCR) inlet temperature is greater than 760 °C (1400 °F). MONITORED PARAMETER:SCR inlet temperature sensor TYPICAL ENABLING CONDITIONS:Non- Regen mode MONITOR SEQUENCE:None EXECUTION FREQUENCY:Continuous when enabling conditions met TYPICAL DURATION:Two seconds DASH LAMPS:1. MIL2. CEL ENGINE REACTION:Derate 25% NOTE: If code 3246-15 present, fix that first. PROBABLE CAUSES:1. SCR inlet temperature sensor.2. SCR inlet temperature sensor connector/harness.

POSSIBLE CAUSES:1. MCM Pin 2 circuit is shorted to power2. Internal short of the quantity control valve NOTE: Please see the step by step troubleshooting procedures for this specific code. PROBABLE CAUSES:1. Failed quantity control valve.2. Wiring between the quantity control valve and the 120-pin ECM connection.

NOTE: Please see the step by step troubleshooting procedures for this specific code. PROBABLE CAUSES:1. If any codes related to battery voltage are present, fix those first.2. If 625-9 present, troubleshoot that instead.3. If any engine modules have been programmed recently, check configuration.4. Another computer module on the truck (ABS, transmission, cab, etc…) has a failure that is causing this.

NOTE: Please see the step by step troubleshooting procedures for this specific code. PROBABLE CAUSES:1. If any codes related to battery voltage are present, fix those first.2. If 625-9 present, troubleshoot that instead.3. If any engine modules have been programmed recently, check configuration.4. Another computer module on the truck (ABS, transmission, cab, etc…) has a failure that is causing this.

DESCRIPTION:This fault code sets when the motor control module (MCM) detects that there is EGR pressure when the engine is not running. MONITORED PARAMETER:EGR delta pressure. TYPICAL ENABLING CONDITIONS:Coolant temperature greater than 80°C (176°F) and ignition is cycled off for 10 seconds. MONITOR SEQUENCE:None EXECUTION FREQUENCY:Continuous when enabling conditions met. TYPICAL DURATION:15 seconds DASH LAMPS:1. MIL2. CEL ENGINE REACTION:Derate 25% VERIFICATION:1. Run the engine until the coolant temperature is greater than 80°C (176°F).2. Turn the ignition off for 15 seconds.3. Turn the ignition on as a recheck for the fault code. PROBABLE CAUSES:1. EGR delta p sensor failure.2. EGR delta...