O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2)
The P0160 code indicates that the oxygen sensor located after the catalytic converter on Bank 2 (the side of the engine not containing cylinder #1) is not producing any voltage signal. This sensor monitors the efficiency of the catalytic converter. The PCM (Powertrain Control Module) expects a fluctuating voltage signal from the sensor; when no activity is detected for a certain period, it sets this code. Common causes include a faulty sensor, wiring issues, or exhaust leaks.
1. 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 PCM (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Failed emissions test
- Possible decrease in fuel economy
- No noticeable drivability issues in most cases
3. Step-by-Step Diagnosis
Step 1: Scan the vehicle for codes and record freeze frame data.
Step 2: Visually inspect the O2 sensor wiring and connector for damage, corrosion, or loose connections.
Step 3: Using a multimeter, check the sensor's heater circuit and signal voltage. With the engine running, the signal should fluctuate between 0.1V and 0.9V. If no voltage, suspect a faulty sensor or wiring issue.
Step 4: Check for exhaust leaks upstream of the sensor that could cause incorrect readings.
Step 5: If all else is fine, replace the Bank 2 Sensor 2 oxygen sensor.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, it is generally safe to drive short distances, but the vehicle may fail an emissions test and fuel economy could suffer. It's best to address the issue promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for the sensor part, plus labor if you have a mechanic install it. DIY replacement can save on labor costs.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.