This is the official 2013 injector solenoid fault P1220 diagnostic service manual covering PACCAR MX injector solenoid diagnostic procedures for EPA 2013 engines. Published by PACCAR, this technical reference provides step-by-step troubleshooting for fault code P1220 affecting fuel injection systems on medium-duty commercial trucks.
Document details and specifications — injector solenoid fault
| Brand | PACCAR |
| Engine/System | MX Engines (EPA 2013) |
| Fault Code Coverage | P1220 (Injector solenoid valve cylinder 2 – Voltage too high or short circuit to supply on ECU) |
| Pages | 5 |
| File size | 0.5 MB |
| Format | |
| Language | English |
Table of contents
- Fault code description and information
- Component description (fuel injector solenoid valve operation)
- Injector calibration codes and reprogramming requirements
- Diagnostic conditions and fault code set/reset criteria
- Electrical diagrams (D420 PCI ECU, B460/B461 connectors, B421–B426 solenoid valve injectors)
- Connector pinout and signal assignments
- Technical data: resistance measurements for injector solenoid valves cylinders 1–6
- Diagnostic step-by-step procedures (5 steps)
- Verification and drive cycle validation
Applies to these models
This PACCAR MX injector solenoid diagnostic manual applies to PACCAR MX engines manufactured in 2013 with EPA emissions compliance. The document covers fuel injection control on six-cylinder engines using PCI ECU control modules and D420 connector architecture. For complete engine and vehicle support, visit PACCAR official site.
Who needs this injector solenoid fault P1220 manual
Diesel truck mechanics and workshop technicians servicing PACCAR MX-powered commercial vehicles require this manual to diagnose and repair solenoid fault P1220. Fleet maintenance managers and authorized PACCAR service centres use this reference to resolve fuel injection performance issues and engine warning lights related to P1220.
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