P2243

O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1

DTC P2243, sometimes indicated as P224300 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing o2 sensor reference voltage circuit/open bank 1 sensor 1.

The most common cause of this code is a faulty oxygen sensor. Other causes can include a wiring issue, a bad fuel pump, or a problem with the ECU.
To fix this code, first determine which oxygen sensor is causing the issue. If it is a faulty sensor, replace it. If it is a wiring issue, fix the wiring. If it is a fuel pump issue, replace the fuel pump. If it is a problem with the ECU, replace the ECU.

  • P2243: Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1
  • P2243: O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1
  • P2243: O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1
  • P2243: O2 Sensor Reference Voltage Circuit/Open
  • P2243: O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1 5
  • P2243: Heated oxygen sensor (HO2S) 1, bank 1, reference voltage – open circuit
  • P2243: Oxygen sensor (O2S) 1, bank 1, reference voltage – open circuit
  • P2243 00: Oxygen sensor (O2S) 1, bank 1, reference voltage - open circuit
  • P2243 04: HO2S Reference Voltage Circuit Sensor 1 Open
  • P2243 00: Heated oxygen sensor (HO2S) 1, bank 1, reference voltage - open circuit

DTC Trouble Code Search
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • TSB 20-2217 - ENGINE AND ENGINE COOLING
    FORD: Some 2020 explorer vehicles equipped with a 2.3l ecoboost engine and built on or before 02-dec-2019 may exhibit an illuminated malfunction indicator lamp (mil) with diagnostic trouble codes (dtcs) P062C and/or P2243. This may be due to the
  • Service Bulletin - ELECTRICAL SYSTEM
    HONDA: 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 fuel ratio) caps may h
  • TSB-14-0129 - POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
    LINCOLN: 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. *pe
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