P2243: 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 P2243 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

1 complaints filed with NHTSA mention P2243, 1 of them since 2015, across 1 different models. The component owners most often filed it under: engine.

Manufacturer service bulletins that name P2243

9 technical service bulletins and manufacturer communications filed with NHTSA mention P2243, from 5 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • FORD EXPLORER (2020), bulletin 10174385: Some of the affected vehicles may be stuck in low gear after first staring the engine, the transmission may exhibit harsh shifting and hesitation. As a customer continues to drive, the vehicle may default to fourth gear.…
  • LAND ROVER RANGE ROVER (2016), bulletin 10105881: "ISSUE: THE CUSTOMER MAY OBSERVE A MIL IN THE INSTRUMENT CLUSTER RELATING TO THE ENGINE SYSTEM (CHECK ENGINE LIGHT) AND ONE OR MORE CODES STORED IN THE PCM RELATING TO HEATED OXYGEN SENSOR (HO2S) IN THE EXHAUST SYSTEM. T…
  • FORD ESCAPE (2013), bulletin 10056662: FORD/LINCOLN: DIAGNOSTIC TROUBLE CODE (DTC) P0132, P0135, P0030, P2243, P2251 ARE STORED IN POWERTRAIN CONTROL MODULE (PCM) MEMORY AND CAUSES MALFUNCTION INDICATOR LAMP (MIL) TO ILLUMINATE. MODEL 2013 ESCAPE, FUSION, MKZ…
  • LINCOLN MKZ (2013), bulletin 10056662: FORD/LINCOLN: DIAGNOSTIC TROUBLE CODE (DTC) P0132, P0135, P0030, P2243, P2251 ARE STORED IN POWERTRAIN CONTROL MODULE (PCM) MEMORY AND CAUSES MALFUNCTION INDICATOR LAMP (MIL) TO ILLUMINATE. MODEL 2013 ESCAPE, FUSION, MKZ…
  • DODGE RAM 2500 (2010, 2011, 2012), bulletin 10128943: Malfunction Indicator Lamp Illumination Due To Oxygen Sensor This bulletin involves replacement of the Oxygen Sensor Connectors for any Oxygen Sensor related DTC. Do NOT replace any parts prior to performing this bulleti…
  • HONDA CROSSTOUR (2010, 2011), bulletin 10129824: Service bulletin - The MIL is on with DTC P0420 or DTC P0430 (catalyst system efficiency below threshold) with a possible DTC P2243 or DTC P2247 (A/F sensor 1 circuit high voltage). One or both primary A/F Sensor (Air Fu…

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.