This PACCAR U1168A CAN message document is an official diagnostic reference published by PACCAR for technicians and workshop owners troubleshooting repetitive message failures on EPA-regulated MX series engines. The document covers set conditions, diagnostic procedures, reset criteria and repair verification steps for the U1168A trouble code affecting CAN bus communication.
The U1168A code triggers when received CAN message repetition rates fall below specification or when messages fail to arrive entirely, indicating potential wiring or component faults in the vehicle’s networked diagnostic systems.
Document details and specifications — PACCAR U1168A CAN
| Brand | PACCAR |
| Model coverage | MX EPA 2004 and MX EPA 2013 engines |
| System/Group | DTCs / MX Europe Engines (EPA 2004) |
| Publication no. | M033665 |
| Year/Revision | 18 August 2017 |
| Pages | 2 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Table of contents
- Set conditions for U1168A code activation
- Diagnostic condition parameters and timing
- Corresponding OBD readiness monitor reference
- Reset condition and code clearing procedures
- Repair verification test drive protocol
- Possible causes: wiring, components and software
- Additional diagnostic information
Applies to these models
This diagnostic reference applies exclusively to PACCAR MX series engines meeting EPA 2004 and EPA 2013 emissions standards. The U1168A CAN message DTC procedure covers Rapido platform vehicles and related chassis configurations. For chassis-specific applications and current updates, refer to PACCAR official technical portal.
Who needs this PACCAR U1168A CAN message manual
Heavy-duty truck mechanics and workshop service managers diagnosing CAN communication failures on PACCAR MX engines require this U1168A reference. The structured repair verification process helps technicians isolate wiring interruptions, contact resistance and defective modules causing intermittent or missing CAN messages.
The complete U1168A CAN message DTC diagnostic document is available in the DiagTechPro manuals library. Create a free account to download the full 2-page PDF and access thousands of OEM truck service bulletins.
Related manuals library
