P2237

DTC P2237, sometimes indicated as P223700 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 positive current control circuit/open bank 1 sensor 1.

The code means that the PCM is seeing an open circuit in the O2 sensor's positive current control circuit. This can be caused by a wiring issue, a bad sensor, or a bad PCM.
To diagnose the issue, start by checking the wiring and connectors for damage or corrosion. If everything looks OK, then replace the O2 sensor. If the issue persists, then replace the PCM.

• P2237: Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1
• P2237: O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1
• P2237: O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1
• P2237: O2 Sensor Positive Current Control Circuit/Open
• P2237: O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1 5
• P2237: Heated oxygen sensor (HO2S) 1, bank 1, positive current
• P2237: Oxygen sensor (O2S) 1, bank 1, positive current control – open circuit
• P2237 00: Heated oxygen sensor (HO2S) 1, bank 1, positive current control - open circuit
• P2237 00: Oxygen sensor (O2S) 1, bank 1, positive current control - open circuit

These codes are commonly diagnosed with error code P2237.

• P2414 [2] O2 Sensor Exhaust Sample Error Bank 1 Sensor 1
• P2626 [1] O2 Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1