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Fault Code P2243

Code meaning, symptoms, possible causes, part number, and estimated cost.

P2243

O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1

Severity: Medium

This code indicates a problem with the O2 sensor reference voltage circuit or an open circuit in the O2 sensor for Bank 1, Sensor 1. This fault affects the accuracy of oxygen readings and can impact the fuel mixture.

Part Details

Part Name

O2 Sensor

Reference P/N (OEM)

N/A

General part number for this fault code — not necessarily for your specific vehicle

Estimated Cost

₪400 - ₪1200

Engine Location

Exhaust pipe, before the catalytic converter

Symptoms

  • Check Engine Light on
  • Increased fuel consumption
  • Poor engine performance
  • Fuel smell from exhaust

Possible Causes

  • 1Faulty oxygen sensor
  • 2Broken or shorted wiring in the sensor circuit
  • 3Loose or corroded connections
  • 4Engine Control Module (ECM) malfunction

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