P2A39
O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 3
P2A39 is an OBD-II diagnostic trouble code meaning: O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 3. Common causes: open or short circuit in o2 sensor control circuit, oxygen sensor malfunction (bank 1, sensor 3). Estimated repair cost: $17–56.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- Unstable engine idling
- Problems with passing technical inspection
Causes
- Open or short circuit in O2 sensor control circuit
- Oxygen sensor malfunction (bank 1, sensor 3)
- Problems with the engine control unit (ECU)
- Corroded or damaged wiring connectors
- Low voltage in the vehicle's electrical system
How to Fix
- Check the continuity of the O2 sensor control circuit
- Inspect connectors and connections for corrosion or damage
- Check the functionality of the oxygen sensor (bank 1, sensor 3)
- If necessary, replace the oxygen sensor
- Check the condition of the engine control unit (ECU)
Related codes
Error P2A39 by Vehicle Brand
FAQ
What does the P2A39 code mean?
P2A39 is an OBD-II diagnostic trouble code that indicates: O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 3
What causes a P2A39 error code?
The most common causes of P2A39 include: Open or short circuit in O2 sensor control circuit; Oxygen sensor malfunction (bank 1, sensor 3); Problems with the engine control unit (ECU); Corroded or damaged wiring connectors.
How do I fix a P2A39 diagnostic trouble code?
To fix P2A39: Check the continuity of the O2 sensor control circuit. Inspect connectors and connections for corrosion or damage. Check the functionality of the oxygen sensor (bank 1, sensor 3). For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2A39?
Yes, but get it checked soon
How much does it cost to fix P2A39?
The estimated repair cost for P2A39 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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