DTC U0118 — Lost Communication With Fuel Additive Control Module (PSA FAP)
DTC U0118 is a standardized diagnostic trouble code defined as "Lost Communication With Fuel Additive Control Module (PSA FAP)" within the DPF / FAP Additive Off subsystem. In DaVinci Deluxe Cloud Edition (v1.0.44), workshops can diagnose root causes or apply deterministic off-road/motorsport subsystem & path-level U0118 deactivation on a 100% virgin original ECU file.
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Engineering Breakdown for Fault Code U0118
| Diagnostic Parameter | Technical Specification for U0118 |
|---|---|
| Fault Code Identifier | U0118 (ISO 15031-6 Network / CAN-LIN Communication) |
| Official Definition | Lost Communication With Fuel Additive Control Module (PSA FAP) |
| Primary ECU Subsystem | DPF / FAP Additive Off |
| Limp-Mode & Derate Impact | Triggers MIL / glow-plug lamp, blocks active regeneration, reduces boost/fuel torque request, and elevates exhaust backpressure. |
| 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 DPF / FAP Additive Off calibration or selective path-level U0118 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 U0118 mean?
Diagnostic Trouble Code U0118 means "Lost Communication With Fuel Additive Control Module (PSA FAP)" and belongs to the DPF / FAP Additive Off monitoring subsystem.
What symptoms does U0118 cause on diesel or petrol ECUs?
Triggers MIL / glow-plug lamp, blocks active regeneration, reduces boost/fuel torque request, and elevates exhaust backpressure.
How is U0118 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 DPF / FAP Additive Off calibration or selective path-level U0118 deactivation with 24h/7 live engineering support.