C1A16 on Nissan vehicles

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Owners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.

Bulletins and campaigns Nissan filed with NHTSA whose summary names C1A16. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• NTB15-099B Service bulletin
  2016-09-06 · Electrical System
• "SERVICE INFORMATION FOR DTCS C1A12 AND C1A16 THIS BULLETIN HAS BEEN AMENDED. THE APPLIED VEHICLES SECTION HAS BEEN REVISED, A PHOTO HAS BEEN ADDED TO PAGE 4, AND ICC/DISTANCE SENSOR LOCATION INFORMATION FOR MAXIMA AND ROGUE HAS BEEN ADJUSTED. NO OTHER CHANGES HAVE BEEN MADE. PLEASE DISCARD PREVIOUS VERSIONS OF THIS BULLETIN."
• NTB15-099C Service bulletin
  2021-03-12 · Electrical System
• SERVICE INFORMATION FOR DTCS C1A12 AND C1A16 This bulletin has been amended. See AMENDMENT HISTORY on the last page. Discard all previous versions of this bulletin.
• NTB19-033G Service bulletin
  2025-02-20 · Electrical System
• INTELLIGENT CRUISE CONTROL INOPERATIVE AND AEB/FEB WARNING LIGHT ON OR RADAR OBSTRUCTION MESSAGE DISPLAYED WITH DTC C1A16 OR C2582 IF YOU CONFIRM IMPORTANT: The purpose of ACTION (on the next page) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to successfully completing this repair.

A stored code names the test that failed, never the part that caused it. The record above is what Nissan and its owners have filed about it; the code’s page across every make has the whole file.