The injector solenoid fault P1228 code P1228 diagnostic manual is the official 2013 service documentation for troubleshooting high voltage and short circuit faults on fuel injector solenoid valves in cylinders 4, 5, or 6. Published by PACCAR for MX-series engines under EPA 2013 emissions standards, this guide provides mechanics with complete diagnostic procedures, electrical schematics, and component testing specifications for the P1228 fault condition.
Fault code P1228 indicates a voltage too high or short circuit to supply condition on ECU D420 pins A11, A3, or A7, affecting the injector solenoid control circuit. The injector solenoid fault P1228 code manual covers the detection of abnormal high-side voltage on fuel injectors and driver bank voltage thresholds that trigger the diagnostic.
Document details and specifications — injector solenoid fault
| Brand | PACCAR |
| Model coverage | MX-series engines |
| System/Group | DTCs / MX Engines (EPA 2013) |
| Publication number | P1228 |
| Year/Revision | 2013 |
| Pages | 6 |
| File size | 0.6 MB |
| Format | |
| Language | English |
Table of contents
- Fault code description and information
- Description of injector solenoid components and control function
- Injector calibration codes and programming requirements
- Diagnostic conditions and set/reset criteria
- Electrical wiring diagrams and connector pinouts (D420, B460, B461)
- Technical data and resistance measurements for cylinders 4, 5, 6
- Possible causes: faulty wiring, connectors, injectors
- Step-by-step diagnostic troubleshooting procedure (Steps 1–8)
- Verification and drive cycle validation
Applies to these models
This injector solenoid fault P1228 code manual applies to 2013 PACCAR MX-series diesel engines equipped with PCI ECU D420 fuel injection control systems. The diagnostic covers injector solenoid valves B424, B425, and B426 (cylinders 4, 5, and 6) and the external pass-through connector harness assembly. For more information on PACCAR engine systems, visit PACCAR official.
Who needs this solenoid fault P1228 code manual
Diesel engine mechanics, workshop technicians, and diagnostic specialists troubleshooting P1228 faults on PACCAR MX trucks require this manual. The step-by-step electrical testing procedure, pinout diagrams, and resistance specifications enable efficient diagnosis of injector voltage and short circuit failures without guesswork.
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