This PACCAR P0668 temperature sensor procedure delivers comprehensive diagnostic steps including heat soak testing to isolate temperature monitoring faults. The PACCAR P0668 temperature sensor guide covers PCI ECU connector inspection, electrical verification, and multiple temperature test cycles for validating repairs on MX Europe Engines EPA 2004 systems.
Document details and specifications — PACCAR P0668 temperature
| Brand | PACCAR |
| Model coverage | MX EPA13, MX EPA04 engines |
| System/Group | DTCs / MX Europe Engines (EPA 2004) |
| Publication no. | M050278 |
| Year/Revision | 08.18.2016 |
| Pages | 4 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Table of contents
- Step-by-step troubleshooting methodology
- Step 1 — PCI ECU D420 connector checks and visual inspection
- Step 1A — Visual inspection of connections, wiring, connector pins, moisture, insulation
- Step 1B — Special heat soak test with system initiation and steady-state driving cycle
- Step 2 — Repair verification cycles with power-up/electrical cycle
- Step 2A — Repair verification cycle execution
- Step 2B — DAVIE diagnostics quick check and active DTC verification
Applies to these models
P0668 temperature sensor applies to MX EPA13 and MX EPA04 engines. The P0668 temperature sensor procedure uses heat soak testing with loaded trailer operation at highway speeds. Visit PACCAR official website for additional support resources.
Who needs this P0668 temperature sensor guide
Technicians diagnosing P0668 temperature sensor faults need this manual to execute heat soak test cycles properly. The P0668 temperature sensor guide requires driving the truck at sustained engine load to validate temperature sensor operation.
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