喷油嘴喷孔积碳半堵塞时，喷油器喷油量减少，回油量增加，柴油机工作无力。
喷孔积碳全堵塞时，柴油机产生的故障现象与喷油嘴针阀卡死故障现象相同，PUE GK即喷油器不喷油不工作。
故障原因：
原因主要是柴油和机油在缸内燃烧不完全，与进气过滤不净的尘土结合而形成积碳。
积碳粘结在燃烧室里的气门、活塞、缸套、排气管道及喷油嘴等零件上。
| 喷油嘴 | P(共轨) | 093400-9240 | DLLA148P924 |
| 喷油嘴 | P(共轨) | 093400-9150 | DLLA148P915 |
| 喷油嘴 | P(共轨) | 093400-8720 | DLLA148P872 |
| 喷油嘴 | P(共轨) | 093400-8280 | DLLA148P828 |
| 喷油嘴 | P(共轨) | 093400-8260 | DLLA148P826 |
| 喷油嘴 | P(共轨) | 093400-8240 | DLLA148P824 |
| 喷油嘴 | P(共轨) | 093400-8210 | DLLA148P821 |
| 喷油嘴 | P(共轨) | 093400-8220 | DLLA148P820 |
| 喷油嘴 | P(共轨) | 093400-8170 | DLLA148P817 |
| 喷油嘴 | P(共轨) | 093400-8160 | DLLA148P816 |
| 喷油嘴 | P(共轨) | 093400-8000 | DLLA148P800 |
| 喷油嘴 | P(共轨) | 093400-7650 | DLLA148P765 |
| 喷油嘴 | P(共轨) | 093400-7630 | DLLA148P763 |
| 喷油嘴 | P(共轨) | DLLA148P2689 | DLLA148P2689 |
| 喷油嘴 | P(共轨) | DLLA148P2628 | DLLA148P2628 |
| 喷油嘴 | P(共轨) | DLLA148P2623 | DLLA148P2623 |
| 喷油嘴 | P(共轨) | 0 433 172 538 | DLLA148P2538 |
| 喷油嘴 | P(共轨) | 0 433 172 523 | DLLA148P2523 |
| 喷油嘴 | P(共轨) | 0 433 172 522 | DLLA148P2522 |
| 喷油嘴 | P(共轨) | 0 433 172 516 | DLLA148P2516 |
| 喷油嘴 | P(共轨) | 0 443 172 497 | DLLA148P2497 |
| 喷油嘴 | P(共轨) | 0 433 172 382 | DLLA148P2382 |
| 喷油嘴 | P(共轨) | 0 433 172 369 | DLLA148P2369 |
| 喷油嘴 | P(共轨) | 0 433 172 361 | DLLA148P2361 |
| 喷油嘴 | P(共轨) | DLLA148P2356 | DLLA148P2356 |
| 喷油嘴 | P(共轨) | 0 433 172 310 | DLLA148P2310 |
