What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
U140500Terminal 15, Signal Implausible” in Various Control Units (35 / 26)Manufacturer communications
6Original wording in English
PORSCHE
Reported code forms U140500
Technical information for a Malfunction Indicator Light Active / Warning Message All-Wheel Drive Disturbed: Fault Memory Entry “U140500 - Terminal 15, Signal Implausible” in Various Control Units (35 / 26)
AUDI
Reported code forms U140500
This bulletin provides information when "Electrical system fault" is displayed in the instrument cluster, DTC: P18F100, P0A1B00, U140500.
AUDI
Reported code forms U140500
This bulletin provides instructions for when the message "Electrical system: fault. Please contact workshop" intermittently appears in the instrument cluster accompanied by one or more DTCs U140500, P0A1B00, P18F100.
AUDI
Reported code forms U140500
This bulletin provides instructions for when the message "Electrical system: fault. Please contact workshop" intermittently appears in the instrument cluster accompanied by one or more DTCs U140500, P0A1B00, P18F100.
AUDI
Reported code forms U140500
This bulletin provides instructions for instances where the message "Electrical system: fault. Please contact workshop" appears intermittently in the instrument cluster, and is accompanied by one ore more of the…
AUDI
Reported code forms U140500
This bulletin contains repair instructions for when there is a wiring harness that has been chafed, DTCs U121C00, U011000, U003600, U002800, U002900, U140500, P0A2F00, and/or P0A1B00 may be stored.
Check vehicle applicability
36A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Audi | Q4 E-TRON | 2022 |
| Audi | Q4 SPORTBACK E-TRON | 2022 |
| Audi | Q5 | 2020 |
| Audi | Q5 | 2019 |
| Audi | Q5 | 2018 |
| Audi | Q5 PHEV | 2021 |
| Porsche | CAYENNE | 2026 |
| Porsche | CAYENNE | 2025 |
| Porsche | CAYENNE | 2024 |
| Porsche | CAYENNE COUPE | 2026 |
| Porsche | CAYENNE COUPE | 2025 |
| Porsche | CAYENNE COUPE | 2024 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.