This document is the 2013 PACCAR MX P0340 camshaft diagnostic service manual, covering fault code detection and repair procedures for PACCAR MX-series engines compliant with EPA 2013 emissions standards. Published by PACCAR, this five-page technical guide provides mechanics and workshop owners with step-by-step troubleshooting for the P0340 fault code, which triggers when the engine control unit detects distributed or no camshaft speed signal during operation.
The PACCAR MX P0340 code sets when the PCI ECU detects that one or more teeth of the camshaft sensor tone wheel are not detected within one crankshaft revolution. Engine torque is reduced when this fault is active, and the fault requires three drive cycles to recover once repaired.
Document details and specifications — PACCAR MX P0340
| Brand | PACCAR |
| Model coverage | PACCAR MX Engines |
| System/Group | DTCs / MX Engines (EPA2013) |
| Year/Revision | 2013 |
| Pages | 5 |
| File size | 0.5 MB |
| Format | |
| Language | English |
Table of contents
- P0340 Code number and fault code description
- Fault code information and readiness group
- Description of component(s) and system effects
- Location of component(s)
- Diagnostic condition and set/reset conditions
- Electrical diagram and wiring harness connector D420.A pinout
- Technical data: resistance and AC voltage specifications
- Possible causes and additional information
- Diagnostic Step-by-Step troubleshooting (Steps 1–11)
- Verification drive cycle procedure
Applies to these models
This PACCAR MX P0340 manual applies to PACCAR MX-series diesel engines manufactured to meet EPA 2013 emissions regulations. The diagnostic procedures cover crankshaft sensor inspection, camshaft sensor testing, PCI ECU reprogramming, and flywheel/gear timing verification. For official PACCAR engine documentation and updates, visit PACCAR official.
Who needs this PACCAR MX P0340 camshaft manual
Heavy-duty truck mechanics, diesel engine technicians, and workshop owners servicing PACCAR MX engines require this guide to diagnose and repair P0340 faults quickly and accurately. The manual’s eleven-step diagnostic tree, electrical schematics, and technical specifications enable certified technicians to isolate root causes—whether faulty sensors, wiring harness damage, connector corrosion, or timing misalignment—and perform proper repairs while minimizing downtime.
The complete PACCAR MX P0340 camshaft diagnostic manual is available in the DiagTechPro manuals library. Free account registration is required to download the full PDF and access related PACCAR DTC guides.
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