P047E: Exhaust Pressure Sensor B Circuit Intermittent/Erratic

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).

Medium severity. Can I keep driving?You can usually keep driving in the short term. If you smell exhaust fumes in the cabin, stop driving and ventilate the car.

Symptoms

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

Most 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

What to check, in order

Start with the simplest. You can tick off each step.

Look for leaks and visible damage
Gently move the wiring with the engine running and watch whether the reading changes.
Check the connectors and wires near the exhaust
Check the live data
Test the actuator with the scanner

Good to know

Repair difficulty: medium
It can trigger limp mode.
It affects emissions.

What each character of P047E means

P: Powertrain: engine and transmission
0: Generic code: same on every make
4: Emissions
7E: Specific fault in that system

Frequently asked questions

Can I keep driving with code P047E?

You can usually keep driving in the short term. If you smell exhaust fumes in the cabin, stop driving and ventilate the car.

What causes code P047E?

The most common causes are: loose contact at connector or wire near the hot manifold; sensing tube partly blocked (sluggish, jumping values); engine module software (Ford 6.7, 2018).

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.