Powertrain, generic · Auxiliary emission controls

P0470 Exhaust Pressure Sensor A Circuit

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. P0470 is the general circuit fault of sensor A. Ford's 6.7-litre diesel with a digital SENT sensor sets it when the sensor reports an error status or its raw data leave their limits for 5 s; a loss of communication is U0691 instead. Analogue sensors use it for an open or unspecified circuit fault where low and high are not separated.

Likely causes

Sensor faulty internally
Connector corroded or heat-damaged near the manifold
Broken or chafed signal or 5 V wire
Engine module or software

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€80–400
Time0.5–2.5 h

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

Parts involved

exhaust pressure sensor asensor wiringengine control module

Related codes

P0471P0472P0473P047A

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