2021-2023 Nissan Laser/Radar DTC C1A17-49 C2580-49 TSB

Nissan Technical Service Bulletin (TSB) NTB21-106A addresses diagnostic trouble codes (DTCs) C1A17-49 and C2580-49, which may be stored in the laser/radar system of various 2021-2023 Nissan models. This bulletin provides crucial guidance for technicians on how to properly diagnose and resolve these codes, often preventing unnecessary parts replacement. Owners searching for information on a Nissan Sentra C1A17-49 or related issues will find this TSB particularly relevant.

Symptoms

Owners may not directly observe a symptom for these codes unless a warning light appears on the dashboard related to the Intelligent Cruise Control (ICC) system or other advanced driver-assistance features. The DTCs C1A17-49 and C2580-49 specifically indicate a malfunction within the vehicle's laser/radar control unit or ICC sensor. These codes are typically detected during a diagnostic scan by a service technician.

Fault Codes / DTCs

This TSB specifically addresses the following diagnostic trouble codes:

Code	Description	Module
C1A17-49	CONTROL UNIT / ICC SENSOR / ICC SENSOR MALF	LASER/RADAR
C2580-49	CONTROL UNIT	LASER/RADAR

Diagnosis / Trigger Conditions

The key to diagnosing these codes lies in whether they are stored in the "PAST" or "CURRENT" column of the diagnostic tool. If DTC C1A17-49 or C2580-49 is found in the LASER/RADAR system's "PAST" column, it indicates a historical or intermittent issue that is no longer active. If the codes are in the "CURRENT" column, it signifies an active malfunction requiring further investigation.

Important Warnings

Nissan has issued a clear directive regarding these specific diagnostic trouble codes:

• DO NOT replace any parts if DTC C1A17-49 or C2580-49 is stored in the LASER/RADAR in the "PAST" column. Replacing components in this scenario will not resolve the underlying condition and leads to unnecessary costs.

Repair Procedure Summary

For diagnostic trouble codes C1A17-49 or C2580-49 stored in the "PAST" column of the LASER/RADAR system, the repair procedure is straightforward: the DTC should simply be erased. No physical parts replacement is required, saving time and expense. This applies to issues like a Nissan Sentra C1A17-49 that may have been a temporary glitch.

If, however, DTC C1A17-49 or C2580-49 is stored in the "CURRENT" column, indicating an active problem, technicians must refer to the applicable Electronic Service Manual (ESM) for detailed diagnostic and repair instructions. This ensures a thorough investigation into the ongoing malfunction.

Owner Action

If you experience any warning lights related to your Nissan's advanced driver-assistance systems, or if a diagnostic scan reveals DTC C1A17-49 or C2580-49, it is recommended to visit an authorized Nissan dealer. They have the necessary diagnostic tools to determine if the code is a "PAST" or "CURRENT" event and can apply the correct procedure as outlined in TSB NTB21-106A. This ensures that your vehicle receives the appropriate service without unnecessary parts replacement, especially for a Nissan Sentra C1A17-49 code.

This bulletin, originally published as NTB21-106 on November 15, 2021, was amended to NTB21-106A on March 9, 2023, to revise the list of applied vehicles and add DTC descriptions.

NHTSA ID: 10234066