PACCAR MX P0650 is the diagnostic trouble code documented on this 1 page extract from the 2013 PACCAR MX Diagnostic Service Manual, published by PACCAR for EPA2013 MX engines. PACCAR prints the fault as “Malfunction Indicator Lamp (MIL) – Current too low or open circuit on ECU D420 pin B23”, in the manual’s standard fault code layout.
Document details for PACCAR MX P0650
| Brand | PACCAR |
|---|---|
| Model coverage | PACCAR MX engines, EPA2013 emissions level |
| System / group | DTCs / MX Engines (EPA2013) |
| Source publication | 2013 PACCAR MX Diagnostic Service Manual |
| Fault code | P0650 — Malfunction Indicator Lamp (MIL) – Current too low or open circuit on ECU D420 pin B23 |
| Pages | 1 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Fault code summary and monitor data
The manual lists 3 drive cycle recovery, no readiness group and a comprehensive freeze frame type. No trip MIL count is printed for this entry.
- Code number
- Fault code description
- Fault code information
- Description of component(s)
- Set condition of fault code
- Reset condition of fault code
- Possible causes
- Diagnostic Step-by-Step
- Verification Drive Cycle
Component and system background
This is a short referral page rather than a full troubleshooting tree. Component description, location, diagnostic condition, set and reset conditions, electrical diagrams, technical data, possible causes and additional information are all present as headings, but each one carries the same instruction: contact the Engine Support Center.
Set and reset conditions for PACCAR MX P0650
The only procedural line on the page directs the technician to the chassis wiring information, because the circuit runs from ECU D420 pin B23 out into the vehicle harness rather than staying inside the engine control system. The verification drive cycle is listed as not applicable. Treat the page as a pointer: confirm the code with DAVIE, then work the chassis wiring documentation and the Engine Support Center route the manual specifies.
Applies to EPA2013 MX engines
The PACCAR MX P0650 entry sits in the DTCs / MX Engines (EPA2013) section, so it applies to PACCAR MX engines built to that emissions level. Manufacturer product information is published on the PACCAR corporate website.
Who needs the PACCAR MX P0650 fault code page
Technicians reading a live code, foremen writing an estimate and fleet managers deciding whether a truck stays in service all need the manufacturer wording rather than a generic code list.
The full PDF for MX P0650 is in the DiagTechPro manuals library; a free account is required to download it.
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