P2243
O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1
P2243 is an OBD-II diagnostic trouble code meaning: O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1. Common causes: open or short circuit in the oxygen sensor power supply circuit, malfunction of the o2 sensor itself (bank 1, sensor 1). Estimated repair cost: $17–67.
Symptoms
- Check Engine light comes on
- Increased fuel consumption
- Unstable engine idling
- Reduced engine power
- Black smoke from the exhaust pipe
Causes
- Open or short circuit in the oxygen sensor power supply circuit
- Malfunction of the O2 sensor itself (bank 1, sensor 1)
- Poor contact in the sensor connector
- Damage to the wiring harness near the sensor
- Engine ECU malfunction
How to Fix
- Check the integrity of the sensor power supply circuit
- Inspect the sensor connector for damage and oxidation.
- Check the resistance and signal of the oxygen sensor
- If necessary, replace the oxygen sensor (bank 1, sensor 1)
- Check the performance of the engine ECU
Related codes
Error P2243 by Vehicle Brand
FAQ
What does the P2243 code mean?
P2243 is an OBD-II diagnostic trouble code that indicates: O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1
What causes a P2243 error code?
The most common causes of P2243 include: Open or short circuit in the oxygen sensor power supply circuit; Malfunction of the O2 sensor itself (bank 1, sensor 1); Poor contact in the sensor connector; Damage to the wiring harness near the sensor.
How do I fix a P2243 diagnostic trouble code?
To fix P2243: Check the integrity of the sensor power supply circuit. Inspect the sensor connector for damage and oxidation.. Check the resistance and signal of the oxygen sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2243?
Yes, but get it checked soon
How much does it cost to fix P2243?
The estimated repair cost for P2243 is $17–67. Actual cost depends on your vehicle, location, and labor rates.
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