P0309: 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 P0309 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 P0309, 1 of them since 2015, across 4 different models. The component owners most often filed it under: steering.

Most-reported models

VehicleComplaintsModel years reported
NISSAN 370Z32009

Manufacturer service bulletins that name P0309

3 technical service bulletins and manufacturer communications filed with NHTSA mention P0309, from 1 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • FORD F-550 SD (2017), bulletin 10095824: SOME 2017 F-SUPER DUTY, E-SERIES, F53 MOTORHOME, F59 CHASSIS, F-650/750 VEHICLES EQUIPPED WITH A 6.8L ENGINE WITH AN ENGINE BUILT ON 10-SEP-2016 AND THROUGH 15-FEB-2017 MAY EXHIBIT MULTIPLE MISFIRE DIAGNOSTIC TROUBLE COD…
  • FORD F-650 SD (2016), bulletin 10075269: 6.8L - MIL ILLUMINATED WITH VARIOUS DTCS - NO DRIVEABILITY SYMPTOMS - BUILT ON OR BEFORE 2/25/2016 ISSUE Some 2016 F-Super Duty 650/750 vehicles built on or before 2/25/2016 and equipped with a 6.8L engine may exhibit an…
  • FORD F-53 (2016), bulletin 10075267: 6.8L - ILLUMINATED MIL - VARIOUS DTCS - BUILT ON OR BEFORE 2/15/2016 ISSUE Some 2016 F-53 Motorhome Chassis and F-59 Commercial Stripped Chassis vehicles built on or before 2/15/2016 and equipped with a 6.8L engine may e…

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.