Fuel Filter Housing Cracking

The fuel filter housing can crack over time, leading to dangerous fuel leaks. If you’re noticing a fuel smell or pooling fuel near the engine, it’s likely time to inspect the housing before more severe damage occurs.

Exhaust Fluid Heater Problems

The exhaust fluid heater, responsible for warming the DEF fluid to control emissions, can fail and prevent proper exhaust system function. When this part malfunctions, you’ll notice an increase in fuel consumption and possible dashboard warning lights related to emissions.

Diesel Particulate Filter (DPF) Clogging

Like earlier models, the DPF is prone to clogging with soot if not properly maintained. This can reduce engine performance and fuel efficiency. If your truck starts feeling sluggish or there’s an increase in regeneration cycles, it’s likely a DPF issue.

Water Pump Failures

Overheating issues could be a sign that your water pump is failing. The pump is essential in maintaining engine temperature, and a failure can lead to dangerous overheating if not addressed in time.

Radiator Leaks

Radiator leaks are another source of overheating problems. If you notice coolant levels dropping or visible leaks, it’s time to address the radiator before more significant engine issues arise.

Head Gasket Failures

Although not as common in the LML model, head gaskets can still fail, leading to coolant mixing with the oil, engine overheating, and eventual catastrophic engine damage. Symptoms include white smoke from the exhaust or a sweet smell from the engine bay.

Turbocharger Problems

Turbocharger issues, including oil ingestion or wastegate malfunctions, can lead to reduced engine performance and faster wear on the components. A whining noise or lack of power under acceleration can indicate turbo failure.