P0657: owner reports and bulletins

Powertrain (generic, all makes). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got P0657 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

5 complaints filed with NHTSA mention P0657, 4 of them since 2015, across 4 different models. The component owners most often filed it under: engine.

Manufacturer service bulletins that name P0657

2 technical service bulletins and manufacturer communications filed with NHTSA mention P0657, from 2 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • MITSUBISHI MIRAGE (2014, 2015, 2016, 2017), bulletin 10133197: This is a Technical Information Notice sent to dealers. This notice informs dealers how to address stored DTCs (including P0657) in extremely cold ambient temperatures. Dealers can remedy this by replacing the throttle a…
  • ACURA TLX (2015, 2016), bulletin 10107357: "SERVICE BULLETIN - WHILE DRIVING, THE VEHICLE SHIFTS INTO NEUTRAL, THE TRANSMISSION INDICATOR COMES ON AND DTC P0657 (ACTUATOR SUPPLY VOLTAGE CIRCUIT/OPEN) IS STORED. THE DRIVER WILL NOT BE ABLE TO SELECT ANY OTHER GEAR…

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.