Reference

What is wrong with my truck engine?

Start from what you see. Each symptom leads to the documented failures that show it on your engine, ranked from the most widespread, with how to tell them apart, the usual fix and any recall. 110 engine pages, 13 symptoms, 95 trouble codes.

Have a trouble code? Look it up Not sure which engine? Check your VIN

By symptom

Hard start, long crank or no-start 60 known causes on 26 engines Stalls or dies while driving 15 known causes on 12 engines Loss of power, limp mode or derate 67 known causes on 21 engines White smoke from the exhaust 23 known causes on 13 engines Blue or gray smoke (burning oil) 4 known causes on 3 engines Black smoke or smoke under load 5 known causes on 5 engines Losing coolant 40 known causes on 22 engines Overheating or temperature creeping up 29 known causes on 18 engines Oil leak, oil consumption or rising oil level 25 known causes on 15 engines Ticking, knocking, rattle or whine 60 known causes on 24 engines Misfire, rough idle, hesitation or surging 77 known causes on 26 engines DEF, DPF and regeneration warnings 27 known causes on 14 engines Metal in the fuel filter or oil 14 known causes on 14 engines

By engine

Symptoms with two or more documented causes on that engine.

7.3 Power Stroke (1994.5-2003)	Hard start / no-start · Power loss / limp mode · Oil leak / consumption · Engine noise · Misfire / rough running
6.0 Power Stroke (2003-2007)	Hard start / no-start · Stalls while driving · Power loss / limp mode · White smoke · Coolant loss · Overheating · Engine noise · Misfire / rough running
6.4 Power Stroke (2008-2010)	Hard start / no-start · Power loss / limp mode · Blue smoke · Coolant loss · Overheating · Oil leak / consumption · Engine noise · Misfire / rough running
6.7 Power Stroke (2011-present)	Hard start / no-start · Power loss / limp mode · White smoke · Coolant loss · Oil leak / consumption · Engine noise · Misfire / rough running · DEF / DPF warnings
3.0 Power Stroke (2018-2021)	DEF / DPF warnings
5.9 Cummins (1994-2007)	Hard start / no-start · Power loss / limp mode · White smoke · Coolant loss · Engine noise · Misfire / rough running
6.7 Cummins 2007-2018	Hard start / no-start · Power loss / limp mode · White smoke · Coolant loss · Overheating · Oil leak / consumption · Engine noise · Misfire / rough running · DEF / DPF warnings
6.7 Cummins 2019+	Hard start / no-start · Power loss / limp mode · White smoke · Coolant loss · Engine noise · DEF / DPF warnings
Ram 1500 EcoDiesel (2014-2019)	Hard start / no-start · Coolant loss
Duramax LB7-LMM (2001-2010)	White smoke · Coolant loss · Misfire / rough running
Duramax LML (2011-2016)	Hard start / no-start · Power loss / limp mode · Coolant loss · Engine noise · Misfire / rough running · DEF / DPF warnings
Duramax L5P (2017-present)	Hard start / no-start · Power loss / limp mode · Overheating · Misfire / rough running · DEF / DPF warnings
Duramax 3.0 (LM2/LZ0)	Power loss / limp mode · Coolant loss · DEF / DPF warnings
3.2 Power Stroke (Transit)	Hard start / no-start · Power loss / limp mode · Coolant loss · Overheating · Oil leak / consumption
ProMaster EcoDiesel (2014-2016)	Power loss / limp mode · Misfire / rough running
Sprinter 3.0 V6 (OM642)	Hard start / no-start · Power loss / limp mode · Misfire / rough running
Sprinter 2.1 (OM651)	Power loss / limp mode · Engine noise · Misfire / rough running
Triton (gas)	Engine noise · Misfire / rough running
6.2 Boss (gas)	Engine noise · Misfire / rough running
7.3 Godzilla (gas)	Hard start / no-start · Engine noise · Misfire / rough running
3.5 EcoBoost (gas)	Hard start / no-start · Power loss / limp mode · Coolant loss · Overheating · Oil leak / consumption · Engine noise · Misfire / rough running
Transit V6 (gas)	Hard start / no-start
6.4 HEMI (gas)	Engine noise · Misfire / rough running
ProMaster 3.6 (gas)	Hard start / no-start · Stalls while driving · Power loss / limp mode · Coolant loss · Misfire / rough running
GM 6.0 / 8.1 Vortec (gas)	Engine noise
GM 6.0 L96 (gas)	Engine noise · Misfire / rough running
GM 6.6 L8T (gas)	Hard start / no-start · Misfire / rough running

Trouble codes on two or more engines

P0011 P0087 P0088 P0201-P0208 P0299 P0300-P0308 P0401 P0402 P0404 P204F P20EE P2200 P242F P2463 P2609

Order: how widespread each failure is in its record (near-universal, very common, common, occasional, rare), then the number of NHTSA owner complaints that match its keywords. Complaint counts are keyword matches, not a manual review of each complaint. A symptom listed here means the failure is documented with that sign; it is not a diagnosis of your truck. Tiers: verified, aggregated, contested, data-gap. How we tier and source facts.