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FIAT GRANDE PANDA 2025 – ADAS AND FRONT SENSORS: ERRORS, DTCs, AND CALIBRATION (TECHNICAL GUIDE)
Updated October 2025 — by Gianni Tritella. On the 2025 Fiat Grande Panda, some users are reporting messages such as "Assistant deactivated" or "Radar unavailable," ACC/Lane Keep inactive, and a camera that doesn't read road signs. This article provides a practical guide to the most common DTCs (C1A67, U1001, B10A0) , the actual causes , and the most effective diagnostic/calibration procedures in the workshop.
📘 Recommended reading
This article is part of the technical dossier dedicated to the 2025 Fiat Grande Panda . If you want a complete overview of all known issues —from the infotainment system to the suspension, from the hybrid modules to HV management—read the main analysis with real DTCs, technical causes, and workshop solutions .
🔍 FIAT GRANDE PANDA 2025 REAL PROBLEMS, DTCs AND TECHNICAL DIAGNOSIS✅ Introduction
The Grande Panda adopts an ADAS architecture with a front radar and windshield camera integrated into the vehicle network (gateway, CAN ADAS, body). OTA updates and greater electronic integration can generate misalignments or incomplete calibrations in early builds or after minor impacts/pressure washes. A thorough diagnosis allows you to resolve most cases without unnecessary replacements.
🔧 Do you want to learn more about the electronic problems of the Grande Panda?
Also discover the complete guide to Uconnect 5 infotainment problems with DTC U1500 , U1510 and B1A00 : symptoms, causes and step-by-step solutions.
🔍 Read: Uconnect 5 Problems – Fiat Grande Panda 2025🚨 Recurring symptoms
- Messages: “Assistant disabled” , “Radar not available” , “Camera not operational” .
- ACC/Lane Keep not selectable or deactivates while driving.
- The camera does not recognize signs/lines, collision warning is limited.
- ADAS warning lights appearing after heavy rain, ice or roller washing.
🧰 Real case in the workshop
A customer with a 2025 Fiat Grande Panda (Hybrid Launch version) complained of recurring "Assistant deactivated" messages after every automatic car wash. Diagnosis: DTC C1A67 active, radar calibration lost due to a slight misalignment of the bracket. Solution: Clean the windshield and radar, check the front bracket, and static calibration with the panel at 4 meters. After updating the ADAS firmware, no new messages appeared in the next 3,000 km.
🧾 Typical DTCs (C1A67 / U1001 / B10A0)
| Code | Brief description | Domain |
|---|---|---|
| C1A67 | Front radar calibration missing/necessary | Radar/ACC |
| U1001 | ADAS CAN network error / intermittent communication | Network/Gateway |
| B10A0 | Front camera anomaly (power/calibration) | Windshield camera |
🧰 Step-by-step diagnosis
- Check environment: clean and dry windshield, no film or objects obstructing the camera; radar grid free of ice/mud/bugs.
- 12V battery and grounds: idle voltage > 12.4 V. Start-up drop < 0.2 V. Many ADAS errors result from borderline power supplies.
- DTC reading for domains: ADAS/radar, camera, gateway, body; save freeze frame (speed, weather, T°).
- Inspect front wiring: bumper connectors (area exposed to humidity), oxides, loose clips, bent brackets.
- Software alignment: Check radar/camera/gateway versions; complete any broken OTAs.
- Calibration: if C1A67/B10A0 is present, perform static (panel) and subsequent dynamic (road-test) following the requirements.
🔍 Common causes
- Mechanical misalignment after light impacts/touch parking or high pressure washing.
- Dirt/ice/condensation on camera lens or radar cover.
- Outdated radar/camera or gateway firmware improperly filtering messages.
- Wiring/grounds with oxidation or loose connectors in the front bumper.
🛠 Solutions & Calibration
1) Cleaning & basic settings
- Clean the camera lens and radar area with non-abrasive microfiber cloths.
- Reset brackets/clips and check module horizontality according to specification.
- Complete any software updates (radar, camera, gateway).
2) Static calibration (in the workshop)
- Flat surface, car in good trim, correct pressures, tank ~½.
- Approved panel positioned at the distance/height specified by the manufacturer.
- Run the wizard with the diagnostic tool (TEXA/Bosch/Launch/Topdon) until success .
3) Dynamic calibration (on road)
- Linear route, clear signage, minimum speed and time indicated by the procedure.
- Complete the phase until the instrument confirms the camera/radar learning .
4) Cabling & gateways
- If U1001 is present, check CAN connectors , grounds and terminals on the front.
- If necessary, perform proxy alignment to re-establish the network topology.
🧩 Quick pre-workshop checklist
- 🧼 Clean the windshield and radar cover (no wax or film in front of the sensors).
- 🔋 Check 12V : > 12.4V at rest; if low, recharge or maintain.
- 🧪 Scan DTCs : save freeze frames and ADAS module software versions.
- 🧷 Inspect front/ground wiring and sensor mounting brackets.
- 🎯 Calibrate in the workshop: static + dynamic with a suitable panel and path.
Bring photos of the messages and conditions (weather, speed, traffic) to the workshop: this speeds up diagnosis and warranty.
🔄 Related models (STLA Small platform)
Much of the ADAS logic is shared with other Stellantis STLA Small models, so symptoms and remedies may also be similar on:
| Model | Year | ADAS Notes |
|---|---|---|
| Fiat 600e | 2024–2026 | Camera/radar calibration after windshield/crash bumper often solves the problem. |
| Jeep Avenger | 2023–2026 | “Assistant unavailable” messages in cold weather; radar cleaning/leveling. |
| Fiat Grande Panda | 2025–2026 | Subject of this focus: DTC C1A67/U1001/B10A0 and combined procedures. |
📌 Conclusions
In 90% of cases, "Assistant deactivated" and similar messages on the 2025 Grande Panda are due to missing calibrations , environmental conditions , or software alignments that need to be completed. Starting with a healthy power supply (12V), cleaning/leveling the sensors, and performing static+dynamic calibration is the most effective strategy for restoring ACC, Lane Keep, and traffic sign recognition without unnecessary replacements.
