The C15 SDP represents a late ACERT era with additional emissions controls relative to earlier prefixes. You’ll see tighter diagnostics, more sensor involvement, and—in many specs—aftertreatment components that must be healthy for trouble-free operation.
When sensors are healthy and aftertreatment is in spec, drivability is steady and fuel performance is predictable. Align software to hardware before first start.
Common ratings: ~435–550 HP with 1,650–1,850 lb-ft torque. Typical homes: later-build OTR tractors and vocational units requiring tight compliance.
