What are the reasons for a diesel engine lacking power when going uphill?

[DeAlan]

The following are specific reasons for insufficient power in diesel vehicles when climbing hills: 1. Intake system failure: including clogged air filters, worn air system connecting pipes, and loose joints. 2. Fuel supply system failure: including clogged diesel filters, blocked fuel lines, and worn fuel pumps. 3. Issues with the electronic control system: faults in the electronic control system leading to insufficient engine power have become a common sudden phenomenon, such as poor wire connections, damaged sensors, or excessive sensor gaps. 4. Problems with the engine itself: including valve wear and engine wear.