3 Paccar diagnostic codes on file — with the full diagnosis, repair steps, and field insights open to read free, no signup required.
Disclaimer: General reference information for trained, qualified technicians only. Codes and procedures vary by model, serial number and software version. Always follow the manufacturer's service manual and your site's safety procedures. Use at your own risk. Not affiliated with or endorsed by any manufacturer.
Find a Paccar code by searching below, or browse the table. Codes on file by system:
| Code | System | Symptom | Full fix |
|---|---|---|---|
| SPN 168 FMI 4 | — | Electronics Glitch. | View fix |
| SPN 3719 FMI 16 | Aftertreatment | Active DPF Warning Light | View fix |
| SPN 4364 - FMI 17 | Aftertreatment | Low SCR Conversion Efficiency / Exhaust Smell | View fix |
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