Service bulletins for the 2014 Peterbilt 320
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
30 on file from NHTSA, as of 2026-10-19.
By type
By component
By topic
| 15-16 | 2017-10-12. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Fix-As-Fail: Repair for horizontal exhaust diffuser configurations with broken brackets or cracked diffuser. |
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| RN-714-1 | 2014-10-28. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION. PETERBILT: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. CERTAIN TRUCKS, AT TIME OF ASSEMBLY, MAY NOT HAVE A PROPERLY SEATED UPPER REVERSE IDLER FEED TUBE (OIL SUPPLY LINE), RESULTING IN BEARINGS HAVING REDUCED OIL PRESSURE. *PE |
| SB-E-097 | 2014-08-16. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE. PETERBILT: THE MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATES DUE TO AN ENGINE CONTROL UNIT (ECU) SOFTWARE ISSUE, REAR NOX SENSOR, OPERATING CORRECTLY. *PE |
| TSB-130155 | 2014-02-26. Service bulletin. ELECTRICAL SYSTEM:WIRING; ELECTRICAL SYSTEM:STARTER ASSEMBLY:RELAY. CUMMINS: THE RELAYS AND FUSES OF AFTERTREATMENT SYSTEMS, IN WIRING HARNESS, IS POTENTIALLY NOT ADEQUATELY SECURED VIA ORIGINAL EQUIPMENT MANUFACTURE (OEM) AND HAVE WIRE RUBBING POINTS, RELAY DAMAGE OR RUB POINTS. *PE |
| SB-11-13 | 2014-02-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. PETERBILT: AN ACTIVE FAULT CODE 3911, AMMONIA SENSOR COMMUNICATION, MAY BE DISPLAYED AND A REPAIR STRATEGY IS BEING PROVIDED. MODEL 320. *PE |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.