OBD Guide
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P047E

Exhaust Pressure Sensor B Circuit Intermittent/Erratic

P047E is an OBD-II diagnostic trouble code meaning: Exhaust Pressure Sensor B Circuit Intermittent/Erratic. Common causes: contamination or clogging of the pressure sensor with soot and carbon deposits, damaged or oxidized sensor connector. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–167 (est.)

Symptoms

  • Check Engine Light Is On
  • Possible power reduction
  • Particulate filter regeneration failure (diesel)
  • Unpredictable operation of the EGR system
  • Periodic failures during acceleration
  • Increased exhaust smoke

Causes

  • Contamination or clogging of the pressure sensor with soot and carbon deposits
  • Damaged or oxidized sensor connector
  • Damage to the sensor diaphragm due to thermal shock
  • Crack or blockage in the pressure tube leading to the sensor
  • Vibration wear of wiring in high temperature zones
  • Faulty sensor (mechanical failure)

How to Fix

  1. Read data in real time: observe the readings of pressure sensor B under different loads
  2. Visually inspect the sensor, its connector and impulse tube
  3. Clean the impulse tube connecting the sensor to the exhaust tract - it is often clogged with soot
  4. Check the integrity of the wiring with an oscilloscope - an unstable signal is clearly visible on the graph
  5. Replace the sensor if unstable readings are confirmed
  6. On diesel engines, check the condition of the particulate filter - its blockage can create abnormal pressure
  7. Reset codes and test drive with data logging

Related codes

P047BP047CP047DP047FP0475P0476P242F

Error P047E by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P047E code mean?

P047E is an OBD-II diagnostic trouble code that indicates: Exhaust Pressure Sensor B Circuit Intermittent/Erratic

What causes a P047E error code?

The most common causes of P047E include: Contamination or clogging of the pressure sensor with soot and carbon deposits; Damaged or oxidized sensor connector; Damage to the sensor diaphragm due to thermal shock; Crack or blockage in the pressure tube leading to the sensor.

How do I fix a P047E diagnostic trouble code?

To fix P047E: Read data in real time: observe the readings of pressure sensor B under different loads. Visually inspect the sensor, its connector and impulse tube. Clean the impulse tube connecting the sensor to the exhaust tract - it is often clogged with soot. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P047E?

Do not drive — repair immediately

How much does it cost to fix P047E?

The estimated repair cost for P047E is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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