C1A18 on 2020-2024 Nissan Titan (SV, PRO-4X, SL, Platinum Reserve) — Manufacturer-Specific Driver-Assist/Chassis Fault
1 vehicles · 1 makes · $200-$1,400 repair
Most Reported On
C1A18 is an OBD-II diagnostic trouble code meaning “Manufacturer-Specific Driver-Assist/Chassis Fault.” C1A18 is a manufacturer-specific chassis code (seen on Nissan/Infiniti) generally related to the radar/driver-assistance sensor system, though some references tie it to other chassis sub-conditions. It indicates the module detected a fault or invalid condition affecting an ADAS or chassis function. Because the exact meaning varies by maker and the code is not well documented, the specific component and cause should be confirmed with the factory service manual or a brand-specific scan tool. This code is most commonly reported on 2020-2024 Nissan Titan (SV, PRO-4X, SL, Platinum Reserve), with repair costs ranging from $200 to $1,400.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose C1A18, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does C1A18 mean?
C1A18 stands for "Manufacturer-Specific Driver-Assist/Chassis Fault." C1A18 is a manufacturer-specific chassis code (seen on Nissan/Infiniti) generally related to the radar/driver-assistance sensor system, though some references tie it to other chassis sub-conditions. It indicates the module detected a fault or invalid condition affecting an ADAS or chassis function. Because the exact meaning varies by maker and the code is not well documented, the specific component and cause should be confirmed with the factory service manual or a brand-specific scan tool.
What are the most common causes of C1A18?
The most common causes of C1A18 are: Faulty driver-assist/radar sensor or related component, Sensor blockage or misalignment, Damaged wiring or connectors, Corrosion or water intrusion at connectors, Low system voltage or poor ground, Related control module fault. The specific cause varies by vehicle.
How much does it cost to fix C1A18?
Repair costs for C1A18 range from $200 to $1,400, depending on the vehicle and root cause.
Which vehicles are affected by C1A18?
Au7o has documented C1A18 across 1 vehicle models from 1 manufacturers: Nissan.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.