Short answer, yes, you can clean diesel injectors yourself! Here is the "official" answer from AI : Injectors are not made to be taken apart and cleaned by the average person. There are companies that specialize in it, and have the replacement o-rings and things to do it and sell re-manufactured. The user can keep them clean by buying top-tier gas, or adding a bottle of Te_h__n at a regular interval. Here is MY answer based on data gathered over the past 58 years of operations: Absolutely you...

This easy and inexpensive way to clean your catalytic converter might be all you need to fix check engine light and P0420 code

These two common problems are easily fixable with Motor Purr!