O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2)
The P0160 code indicates that the Engine Control Module (ECM) has detected no signal activity from the oxygen sensor located downstream of the catalytic converter on Bank 2 (the side of the engine not containing cylinder #1). This sensor monitors the catalytic converter's efficiency. The lack of activity suggests the sensor is not responding to changes in exhaust oxygen content, which can be due to a faulty sensor, wiring issues, or a problem with the ECM itself.
01. Most Common Causes
- Faulty oxygen sensor (Bank 2 Sensor 2)
- Open or shorted wiring in the sensor circuit
- Corroded or damaged connector
- Exhaust leak near the sensor
- Failed ECM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Failed emissions test
- Decreased fuel economy
- Rough idle or hesitation (less common)
03. Step-by-Step Diagnosis
Step 1: Connect a scan tool and verify the code P0160. Check for other related codes.
Step 2: Visually inspect the O2 sensor wiring and connector for damage, corrosion, or loose connections.
Step 3: Using a multimeter, test the sensor's heater circuit and signal voltage. Compare with manufacturer specifications.
Step 4: If wiring and voltage are normal, replace the Bank 2 Sensor 2 oxygen sensor.
Step 5: Clear the code and test drive to confirm repair.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, but it may cause reduced fuel economy and increased emissions. It is not immediately dangerous, but you should repair it soon to avoid failing an emissions test.
How much does it cost to fix?▼
Typically $150-$300 for parts and labor, depending on vehicle make and model. The sensor itself costs $50-$150, and labor is about $100-$150.