DTC P0407 — Exhaust Gas Recirculation Sensor B Circuit Low (Low-Pressure EGR)
DTC P0407 is a standardized diagnostic trouble code defined as "Exhaust Gas Recirculation Sensor B Circuit Low (Low-Pressure EGR)" within the EGR Off subsystem. In DaVinci Deluxe Cloud Edition (v1.0.44), workshops can diagnose root causes or apply deterministic off-road/motorsport subsystem & path-level P0407 deactivation on a 100% virgin original ECU file.
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Engineering Breakdown for Fault Code P0407
| Diagnostic Parameter | Technical Specification for P0407 |
|---|---|
| Fault Code Identifier | P0407 (SAE J2012 / ISO 15031-6 Powertrain) |
| Official Definition | Exhaust Gas Recirculation Sensor B Circuit Low (Low-Pressure EGR) |
| Primary ECU Subsystem | EGR Off |
| Limp-Mode & Derate Impact | Activates reduced-power limp mode, rough low-load air-mass transitions, or NOx plausibility warnings on Euro 5 / Euro 6 engines. |
| Workshop Pre-Check | Inspect harness continuity, +5V/+12V/+24V reference supply, live sensor plausibility, and mechanical component integrity before any software modification. |
| Off-Road / Motorsport Calibration | Upload a 100% virgin unmodified original ECU binary at https://www.davincideluxe.fr/online-ecu-tuning to apply complete EGR Off calibration or selective path-level P0407 fault-class deactivation while keeping engine oil, temperature, and rail-pressure safety intact. |
Related OBD2, Euro 6d & 24V Diagnostic Trouble Codes (148)
Frequently Asked Technical Questions
What does fault code P0407 mean?
Diagnostic Trouble Code P0407 means "Exhaust Gas Recirculation Sensor B Circuit Low (Low-Pressure EGR)" and belongs to the EGR Off monitoring subsystem.
What symptoms does P0407 cause on diesel or petrol ECUs?
Activates reduced-power limp mode, rough low-load air-mass transitions, or NOx plausibility warnings on Euro 5 / Euro 6 engines.
How is P0407 calibrated safely in DaVinci Deluxe Cloud Edition (v1.0.44)?
After mechanical verification, upload a 100% virgin original Bench, Boot, or OBD ECU readout to DaVinci Deluxe Cloud Edition (https://www.davincideluxe.fr/online-ecu-tuning) to apply deterministic EGR Off calibration or selective path-level P0407 deactivation with 24h/7 live engineering support.