PACCAR MX P101E is the diagnostic trouble code documented on this 11 pages extract from the 2013 PACCAR MX Diagnostic Service Manual, published by PACCAR for EPA2013 MX engines. PACCAR prints the fault as “BPV actuator position – Unable to reach target position”, in the manual’s standard fault code layout.
Document details for PACCAR MX P101E
| 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 | P101E — BPV actuator position – Unable to reach target position |
| Pages | 11 |
| File size | 0.7 MB |
| Format | |
| Language | English |
Fault code summary and monitor data
The manual lists 1 trip MIL with 3 drive cycle recovery, no readiness group and an exhaust gas freeze frame type. The diagnostic runs continuously when the ignition is on.
- 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
The back pressure valve (BPV) actuator (L096) consists of an actuator and a BPV valve whose main task is to create back pressure in the exhaust system and control exhaust gas mass flow. The actuator carries its own ECU, electromotor, output shaft, electromotor and output shaft position sensors and a printed circuit board temperature sensor, and it talks to the PCI ECU over E-CAN.
Set and reset conditions for PACCAR MX P101E
The code is set when the BPV valve detects a difference between the actual shaft position and the target position. It goes inactive after the ignition has been off for at least 15 seconds and is keyed on again without the fault. Listed causes include a bent actuator lever or connection rod and a sticking or blocked BPV valve or mechanism. With this fault active the actuator motor is switched off and the valve stays fully open at the 100 percent position. Repair verification starts with the DAVIE Quick Check function.
Applies to EPA2013 MX engines
The PACCAR MX P101E 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 P101E 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 P101E is in the DiagTechPro manuals library; a free account is required to download it.
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