O2 Sensor Slow Response - Rich to Lean Bank 2 Sensor 2

Descripción

This code indicates that an oxygen sensor on Bank 2 (the side of the engine opposite cylinder #1) is slow to switch from reading a rich fuel mixture to a lean one. This sensor helps the engine computer fine-tune fuel delivery for that bank.

Pasos de reparación

1. 1 Check the wiring and connector to the Bank 2 Sensor 2 oxygen sensor for damage, corrosion, or loose connections and repair as needed.
2. 2 Inspect the exhaust system near the Bank 2 Sensor 2 location for leaks, cracks, or loose connections and repair any leaks found.
3. 3 Check for contamination on the oxygen sensor caused by oil burning, coolant leaks, or use of silicone-based sealants, and address the underlying cause.
4. 4 Clear the diagnostic trouble code and drive the vehicle to see if the code returns, confirming the issue is persistent.
5. 5 Replace the Bank 2 Sensor 2 (downstream) oxygen sensor if the wiring and exhaust are in good condition.
6. 6 Have the engine control module (ECM) inspected and tested by a professional if the new oxygen sensor does not resolve the code.

Diagnóstico y costo