The MX camshaft sensor P1340 manual (P1340) is the authoritative service reference for diagnosing and repairing camshaft speed signal faults on 2013 PACCAR MX engines. Published by PACCAR for their EPA 2013-compliant MX engine family, this document provides workshop owners and professional mechanics with complete technical data, wiring schematics, and validated troubleshooting procedures to resolve P1340 fault codes.
P1340 indicates a “Camshaft speed signal — Disturbed or no signal during engine start” condition. The MX camshaft sensor P1340 guide addresses cylinder detection synchronization, crankshaft alignment verification, and the critical role of the camshaft sensor (F558) in engine operation.
Document details and specifications — MX camshaft sensor
| Brand | PACCAR |
| Model coverage | MX Engines (EPA 2013) |
| System/Group | DTCs / MX Engines (EPA2013) |
| Year/Revision | 2013 |
| Pages | 5 |
| File size | 0.5 MB |
| Format | |
| Language | English |
Table of contents
- P1340 Code number and fault code description
- Fault code information (1 trip MIL, 3 drive cycle recovery)
- Description of component(s) and system effects
- Location of component(s)
- Diagnostic condition and set/reset conditions
- Electrical diagram(s) — D420 PCI ECU and F558 camshaft sensor wiring
- Wiring harness connector pinout (D420.A and F558)
- Technical data — Component check (camshaft sensor resistance and AC voltage specifications)
- Possible causes
- Diagnostic step-by-step procedures (Steps 1–11)
- Verification drive cycle
Applies to these models
This MX camshaft sensor P1340 document covers 2013 PACCAR MX diesel engines equipped with the PCI ECU (D420) and F558 camshaft sensor assembly. It applies to any truck or workshop using PACCAR MX powertrains that experience P1340 fault code activation. For complete PACCAR engine and powertrain documentation, visit PACCAR official.
Who needs this camshaft sensor P1340 manual
Professional diesel mechanics and workshop owners diagnosing PACCAR MX engine starting issues, torque reduction symptoms, or active P1340 codes require this manual. The step-by-step camshaft sensor P1340 procedures guide technicians through sensor resistance checks, AC voltage measurement, harness continuity testing, and flywheel/timing verification without guesswork.
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