O2 Sensor Exhaust Sample Error Bank 2 Sensor 1
The P2415 code indicates that the Engine Control Module (ECM) has detected an error in the exhaust gas sampling process for the Bank 2 Sensor 1 oxygen sensor. This sensor is located upstream of the catalytic converter on the engine bank that does not contain cylinder #1. The ECM monitors the sensor's response time and signal integrity; if the sensor fails to switch properly or its signal is erratic, this code is set. Common causes include a faulty oxygen sensor, exhaust leaks, wiring issues, or contamination from oil or coolant.
1. Most Common Causes
- Faulty or degraded oxygen (O2) sensor
- O2 sensor contamination from oil, coolant, or fuel additives
- Failed internal heater circuit in the O2 sensor
- Short circuit or open circuit in the O2 sensor wiring
- Corroded or loose electrical connections in the sensor circuit
- Exhaust leak upstream of the O2 sensor diluting the gas sample
- PCM with outdated software or internal failure (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor fuel economy
- Rough idle or hesitation
- Failed emissions test
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the O2 sensor wiring and connector for damage.
Step 3: Check for exhaust leaks near the sensor using a smoke machine.
Step 4: Test the O2 sensor signal with a multimeter or scan tool.
Step 5: Replace the sensor if it fails testing and clear the code.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
You can drive short distances, but it may cause poor fuel economy and damage the catalytic converter over time. It's best to diagnose and fix promptly.
How much does it cost to fix?▼
Replacing the oxygen sensor typically costs $150-$400 including parts and labor, depending on vehicle make and model.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.