Diagnostic article Generic OBD-II
P045F: Volkswagen CJAA low-pressure EGR stuck-closed monitor
P045F identifies the low-pressure EGR stuck-closed condition in Volkswagen's 2014 CJAA chart.
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Documented application
Volkswagen 2014 Golf/GTI/Golf R Quick Reference Specification Book, January 2014; CJAA chart only. Source-scoped monitor explanation, not universal thresholds.
The code alone does not identify a failed part or establish that a vehicle is safe to drive. Confirm the vehicle, reporting module and applicable service procedure.
P045F identifies the low-pressure EGR stuck-closed condition in Volkswagen's 2014 CJAA chart. The detailed row compares the requested EGR position with the position reported by the sensor.
Commanded and actual position must be distinguished
Volkswagen lists a closed-state position below 12 percent in this comparison. The value is part of the documented monitor, not a universal normal EGR opening or an instruction to adjust the valve to that position.
A closed valve is not inherently faulty when closure is requested. The diagnostic meaning comes from the comparison with desired position. That is why the actual position alone cannot establish the stuck-closed condition without command context.
Separate position failure from electrical range faults
The CJAA chart also contains distinct actuator and position-sensor circuit entries. P045F's performance result does not, by itself, prove an open wire or identify a mechanically seized valve. The reported position, actuator response and circuit evidence need to be interpreted together under the full workshop procedure.
The source identifies the low-pressure EGR path, so do not transfer this row directly to the separate high-pressure EGR actuator. It provides no cleaning procedure, actuator travel limit or replacement recommendation. Professional diagnosis should determine why desired and actual position disagree before selecting a repair.
Source: Volkswagen manufacturer diagnostic chart, physical PDF page 42; physical PDF page 59.
Article source documents
Source checks describe how the text was prepared; they do not certify a diagnosis or confirm compatibility with every vehicle using this code.
Original code reference
Dictionary definition
EGR B Control Stuck Closed
This definition retains its original catalog scope. The article above is limited to its explicitly documented application.
Reference scope
Generic OBD-II definition.
A manufacturer label does not establish the model, year, engine or module to which a diagnosis applies. Read the safety and diagnostic limits.
Definition source
- DTC Database: pinned community code definitions
Source checked · MIT