C1611: owner reports and bulletins

Chassis. We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got C1611 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.

What owners report to NHTSA

6 complaints filed with NHTSA mention C1611, 5 of them since 2015, across 5 different models. The component owners most often filed it under: engine.

Manufacturer service bulletins that name C1611

6 technical service bulletins and manufacturer communications filed with NHTSA mention C1611, from 2 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • ACURA RLX (2013, 2014, 2015, 2016), bulletin 10237809: Dealer Message - Due to manufacturing errors, abnormal noise may be heard from the rear when driving straight or making small side-to-side turning movements with the steering wheel. The MIL may also illuminate with DTC C…
  • KIA RIO (2012, 2013), bulletin 10057714: KIA: 2012-2013 MY RIO: BULLETIN INFORMATION REGARDING IN PANEL MODULE REPLACEMENT - DTC C1611 ON VEHICLES MANUFACTURED IN NOVEMBER 7, 2011 THROUGH JULY 10, 2013. *LJ

Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.