PACCAR MX P0205 is the fault-code chapter of the 2013 PACCAR MX Diagnostic Service Manual covering injector solenoid valve cylinder 5 with current too low or an open circuit. PACCAR classes it as a one-trip MIL code with three drive cycle recovery and a comprehensive freeze frame. It is the longest injector-circuit chapter because it prints the pin map and component check for every cylinder.
Document details at a glance
| Brand | PACCAR |
|---|---|
| Model coverage | PACCAR MX engines, EPA 2013 emissions level |
| System group | DTCs, MX Engines EPA2013 |
| Source publication | 2013 PACCAR MX Diagnostic Service Manual, pages 198 to 203 |
| Pages | 6 |
| File size | 0.4 MB |
| Format | |
| Language | English |
What the PACCAR MX P0205 chapter covers
- Connector split: B460 serves cylinders 1 to 3 and B461 serves cylinders 4 to 6
- Solenoid valves B421 to B426 mapped to PCI ECU D420 pins A1 through A12
- Component check preparation: key off, disconnect the connector, measure on the harness connector
- Resistance of about 0.67 Ω at 20°C and a maximum of 0.94 Ω at 120°C per solenoid
- Set condition: current in the pump control valve less than 4.5 A
- Injector calibration codes that must be reprogrammed with DAVIE after replacement
Diagnostic step sequence and verification
Inside PACCAR MX P0205 the procedure runs as follows. Six steps follow the electrical logic used across the injector codes. After the visual inspection you measure signal circuit voltage at the pump unit connector with the key on, then run diode checks looking for an open circuit on reverse bias and 600 mV plus or minus 200 mV on forward bias. Those results decide between the pump unit and the encapsulated harness, and an unresolved fault goes to the Engine Support Call Center on 1-800-477-0251.
Trucks and engines it applies to
The content targets EPA 2013 PACCAR MX six-cylinder engines and the harnesses used in Kenworth and Peterbilt chassis, so the pin tables serve any injector circuit on that engine family. Model programmes and dealer support for these engines are listed on the PACCAR corporate site.
Who needs the PACCAR MX P0205 chapter
Because it prints all six cylinders side by side, this is the chapter technicians keep open when comparing a suspect injector circuit against a known-good neighbour.
The complete PDF of the PACCAR MX P0205 chapter is filed in the DiagTechPro manuals library, where a free account is required to download it alongside the rest of the MX Engines EPA2013 fault-code set.
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