PACCAR MX P0221 is the fault-code chapter of the 2013 PACCAR MX Diagnostic Service Manual covering a CAN communication fault where message EEC2 is out of range for remote accelerator pedal position. The manual states clearly that this code relates to a communication issue and not to a specific component. It carries three drive cycle recovery, no readiness group and a generic freeze frame type.
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 210 to 213 |
| Pages | 4 |
| File size | 0.7 MB |
| Format | |
| Language | English |
What the PACCAR MX P0221 chapter covers
- Diagnostic condition: the check runs continuously while the ignition is on
- Reset condition: the code goes inactive as soon as the error stops being detected
- The instruction to check the cabin ECU for its own fault codes first
- Electrical diagram pages for the communication network involved
- A note that technical data applies to the system rather than one named component
- Standard rules on back probing, ignition position and disconnecting EAS connectors
Diagnostic step sequence and verification
Inside PACCAR MX P0221 the procedure runs as follows. Four steps structure the work. A visual inspection looks for bent, broken, corroded or loose pins and for signs of exhaust leaks. A data check follows, against the technical data of the specific system. Step three repairs or replaces the component and rechecks for active faults in DAVIE. Verification asks for key on with the brakes set for ten seconds, then a two minute idle.
Trucks and engines it applies to
The chapter applies to EPA 2013 PACCAR MX engines and to the cab network that carries the accelerator message, which is why the cabin ECU is the first place the manual sends you. Model programmes and dealer support for these engines are listed on the PACCAR corporate site.
Who needs the PACCAR MX P0221 chapter
Technicians seeing pedal or cruise complaints with no engine-side hardware fault use this chapter to prove the problem sits on the data bus, and to avoid replacing a healthy sensor.
The complete PDF of the PACCAR MX P0221 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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