OBD Guide
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P014E

O2 Sensor Slow Response - Rich to Lean Bank 2 Sensor 1

P014E is an OBD-II diagnostic trouble code meaning: O2 Sensor Slow Response - Rich to Lean Bank 2 Sensor 1. Common causes: degradation of the zirconium sensor element of the oxygen sensor (natural wear), contamination of the sensor with lead, silicone or oil from exhaust gases. Estimated repair cost: $44–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$44–167 (est.)

Symptoms

  • Check Engine light on dashboard
  • Slight increase in fuel consumption
  • Increased harmful emissions (CO, HC)
  • The scanner shows a “slow” or “sluggish” signal from sensor 1 bank 2
  • Possible long-term fuel trims outside normal limits

Causes

  • Degradation of the zirconium sensor element of the oxygen sensor (natural wear)
  • Contamination of the sensor with lead, silicone or oil from exhaust gases
  • Partial failure of the heating element (the sensor does not warm up well)
  • Poisoning of the sensor by fuel additives or antifreeze due to leakage into the cylinders
  • Sensor overheating due to rich mixture or ignition problems

How to Fix

  1. Read codes and check Bank 2 Long Term Fuel Trims (LTFT)
  2. Observe in real time the switching signal of sensor 1 of bank 2 - Rich-to-Lean time should not exceed 150 ms
  3. Check the sensor heater (resistance 2–20 ohms)
  4. Inspect the sensor for mechanical damage and traces of contamination
  5. Check for oil or antifreeze in the exhaust gases
  6. If the sensor responds slowly when the engine is warm and the heater is working, replace the oxygen sensor

Related codes

P0136P0137P0138P0141P014FP0155P0420

Error P014E by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P014E code mean?

P014E is an OBD-II diagnostic trouble code that indicates: O2 Sensor Slow Response - Rich to Lean Bank 2 Sensor 1

What causes a P014E error code?

The most common causes of P014E include: Degradation of the zirconium sensor element of the oxygen sensor (natural wear); Contamination of the sensor with lead, silicone or oil from exhaust gases; Partial failure of the heating element (the sensor does not warm up well); Poisoning of the sensor by fuel additives or antifreeze due to leakage into the cylinders.

How do I fix a P014E diagnostic trouble code?

To fix P014E: Read codes and check Bank 2 Long Term Fuel Trims (LTFT). Observe in real time the switching signal of sensor 1 of bank 2 - Rich-to-Lean time should not exceed 150 ms. Check the sensor heater (resistance 2–20 ohms). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P014E?

Limited driving only, diagnose soon

How much does it cost to fix P014E?

The estimated repair cost for P014E is $44–167. Actual cost depends on your vehicle, location, and labor rates.

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