OBD-II code · Powertrain (generic)
P014E O2 Sensor Slow Response - Rich to Lean Bank 2 Sensor 1
Pre-cat O2 sensor on bank 2 responds too slowly when mixture transitions from rich to lean. A drifted or sluggish lambda sensor lets the mixture run lean or rich without correction — fuel economy and emissions suffer immediately.
Is it safe to drive with P014E?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor aged
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Oxygen Sensor B2s1
Related codes
- P013AO2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 2
- P013CO2 Sensor Slow Response - Rich to Lean Bank 2 Sensor 2
- P014CO2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1
- P014BO2 Sensor Delayed Response - Lean to Rich Bank 2 Sensor 2
- P014DO2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1
- P014FO2 Sensor Slow Response - Lean to Rich Bank 2 Sensor 1
- P0150O2 Sensor Circuit Malfunction (Bank 2, Sensor 1)
- P0151O2 Sensor Circuit Low Voltage (Bank 2, Sensor 1)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.