P2A3B
O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 3
P2A3B is an OBD-II diagnostic trouble code meaning: O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 3. Common causes: open or short circuit in the sensor control circuit, poor contact in the sensor connector. Estimated repair cost: $22–89.
Symptoms
- Check Engine Light Is On
- Increased fuel consumption
- Reduced engine power
- Unstable engine idling
- Dips during acceleration
Causes
- Open or short circuit in the sensor control circuit
- Poor contact in the sensor connector
- Oxygen sensor malfunction
- Wiring Harness Problems
- Engine control unit malfunction
How to Fix
- Check the integrity of the sensor control circuit
- Inspect the connectors and contacts of the sensor
- Check the resistance and voltage at the sensor
- Replace the faulty oxygen sensor if necessary
- Test the operation of the system after repair
Related codes
Error P2A3B by Vehicle Brand
FAQ
What does the P2A3B code mean?
P2A3B is an OBD-II diagnostic trouble code that indicates: O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 3
What causes a P2A3B error code?
The most common causes of P2A3B include: Open or short circuit in the sensor control circuit; Poor contact in the sensor connector; Oxygen sensor malfunction; Wiring Harness Problems.
How do I fix a P2A3B diagnostic trouble code?
To fix P2A3B: Check the integrity of the sensor control circuit. Inspect the connectors and contacts of the sensor. Check the resistance and voltage at the sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2A3B?
Yes, but get it checked soon
How much does it cost to fix P2A3B?
The estimated repair cost for P2A3B is $22–89. Actual cost depends on your vehicle, location, and labor rates.
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