O2 Sensor Delayed Response - Rich to Lean (Bank 1 Sensor 2)
The P013E code indicates that the oxygen sensor located after the catalytic converter (Bank 1, Sensor 2) is responding too slowly when switching from a rich to a lean fuel mixture. This sensor monitors the efficiency of the catalytic converter. A delayed response can be caused by a faulty sensor, exhaust leaks, or contamination. If left unaddressed, it may lead to decreased fuel economy and increased emissions.
01. Most Common Causes
- Faulty oxygen sensor (Bank 1 Sensor 2)
- Exhaust leak before the sensor
- Contaminated sensor (oil, coolant, fuel additives)
- Wiring or connector issues
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Failed emissions test
- Decreased fuel economy
- Possible rough idle or hesitation
03. 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 or soapy water.
Step 4: Monitor O2 sensor voltage with a scan tool; it should switch rapidly between 0.1V and 0.9V. A slow response indicates a faulty sensor.
Step 5: If sensor is slow, replace Bank 1 Sensor 2 and clear codes.
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's best to diagnose and fix promptly to avoid failing an emissions test.
How much does it cost to fix?▼
Typically $50-$150 for the sensor plus labor if you have a shop do it. DIY can save on labor costs.