P2240
O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1
P2240 is an OBD-II diagnostic trouble code meaning: O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1. Common causes: broken or damaged wires in the sensor control circuit, short circuit in control circuit. Estimated repair cost: $33–167.
Symptoms
- Check Engine light comes on
- Increased fuel consumption
- Unstable engine operation at idle
- Reduced engine power
- Dips during acceleration
Causes
- Broken or damaged wires in the sensor control circuit
- Short circuit in control circuit
- Oxygen sensor malfunction
- Connector problems or contact corrosion
- Malfunction of the engine control unit (rare)
How to Fix
- Check the integrity of the sensor wiring and connectors
- Check resistance and voltage in control circuit
- Replacing the oxygen sensor if necessary
- Check and clean connector contacts
- Flash or replace the ECU if necessary (rarely)
Related codes
Error P2240 by Vehicle Brand
FAQ
What does the P2240 code mean?
P2240 is an OBD-II diagnostic trouble code that indicates: O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1
What causes a P2240 error code?
The most common causes of P2240 include: Broken or damaged wires in the sensor control circuit; Short circuit in control circuit; Oxygen sensor malfunction; Connector problems or contact corrosion.
How do I fix a P2240 diagnostic trouble code?
To fix P2240: Check the integrity of the sensor wiring and connectors. Check resistance and voltage in control circuit. Replacing the oxygen sensor if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2240?
Yes, but get it checked soon
How much does it cost to fix P2240?
The estimated repair cost for P2240 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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