The PACCAR MX camshaft speed diagnostic manual is a comprehensive service document published by PACCAR for 2013 EPA MX engines. This guide covers fault code P1341 (‘Camshaft speed signal – Out of range during engine start’) and provides mechanics with step-by-step troubleshooting procedures, electrical schematics, and technical specifications for diagnosing camshaft sensor faults.
The PACCAR MX camshaft speed system monitors correct alignment between the crankshaft and camshaft during engine startup, enables cylinder detection, and backs up the crankshaft signal. When the PCI ECU detects a disturbed or intermittent camshaft sensor signal, fault code P1341 is activated with a 1-trip MIL and 3 drive cycle recovery requirement.
Document details and specifications — PACCAR MX camshaft
| Brand | PACCAR |
| Model coverage | MX Engines (EPA 2013) |
| System/Group | DTCs / MX Engines |
| Year/Revision | 2013 |
| Pages | 5 |
| File size | 0.5 MB |
| Format | |
| Language | English |
Table of contents
- Fault code P1341 overview and MIL information
- Description of camshaft speed signal components and system effects
- Location of component references
- Diagnostic condition and set/reset procedures
- Electrical diagrams and wiring harness connector pinouts (D420, F558)
- Technical data: camshaft sensor (F558) resistance and AC voltage specifications
- Possible causes and additional component information
- Diagnostic step-by-step troubleshooting (11 sequential steps with Step IDs 1341a–1341k)
- Verification drive cycle procedure
Applies to these models
This PACCAR MX camshaft speed manual applies to 2013 PACCAR MX diesel engines equipped with EPA 2013 emissions compliance. The guide references the PCI ECU (D420), camshaft sensor (F558), crankshaft sensor signal monitoring, and Engine Rapido technical resources for flywheel and timing procedures. For official PACCAR technical resources and support, visit PACCAR official site.
Who needs this MX camshaft speed manual
Diesel truck mechanics, workshop owners, and diagnostic technicians servicing PACCAR MX engines need this MX camshaft speed guide to troubleshoot P1341 faults efficiently. The manual provides essential wiring diagrams, sensor specifications, and a systematic 11-step diagnostic procedure that eliminates guesswork during camshaft sensor diagnosis.
The complete MX camshaft speed diagnostic PDF is available in the DiagTechPro manuals library. A free account is required to download this 5-page service document.
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