Powertrain, generic · Auxiliary emission controls

P047E Exhaust Pressure Sensor B Circuit Intermittent/Erratic

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

The exhaust pressure sensor measures the pressure ahead of the turbine or in the manifold (Ford: turbine upstream pressure, Cummins: exhaust manifold pressure, older Ford diesels: EBP). The module uses it to calculate EGR flow, to control the variable turbine and engine braking, and to protect against overpressure. No manufacturer document available to us uses sensor B – it would be a second sensor, for example on bank 2 of a twin-turbo engine; the description mirrors sensor A. P047E means the signal of sensor B jumps or deviates from the model in operation (for sensor A Ford uses more than 500 kPa or below −100 kPa for 2 s).

Likely causes

Loose contact at connector or wire near the hot manifold
Sensing tube partly blocked (sluggish, jumping values)
Engine module software (Ford 6.7, 2018)
Sensor faulty

Symptoms

  • Check engine light on
  • EGR and turbo control on a substitute value, possibly reduced power
  • Exhaust brake or warm-up flap without function

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–400
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

exhaust pressure sensor bsensor wiringengine control module

Related codes

P0474P047AP047BP047C

References: law.cornell.edu, fordservicecontent.com.