P01FE: Turbocharger Outlet Pressure Sensor B Intermittent/Erratic

Turbocharger outlet pressure sensor B is a second pressure sensor at a compressor outlet – for example one per turbo on twin-turbo engines or a second measuring point; sensor A has the codes P00F8–P00FC. It is a separate family from the boost pressure sensor: GM and Ford report the pressure ahead of the throttle under the boost sensor codes P0236–P0238. No manufacturer using the sensor B codes was found; FCA documents sensor A and a second outlet sensor. P01FE counts brief spikes or dropouts that are too short for the low or high code. Ford's equivalent boost sensor check sets after 10 such events in one drive cycle. The usual cause is a loose or corroded contact or a wire broken by vibration and heat.

Symptoms

• Check engine light on (often intermittent)
• Occasional power dips
• Jerking under boost

Most likely causes

• Loose contact or corroded connector
• Wire breaking from vibration or heat
• Sensor erratic internally

What to check, in order

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

1. Check the hoses, clamps, and intercooler
2. Gently move the wiring with the engine running and watch whether the reading changes.
3. Compare commanded and actual pressure in live data
4. Check the actuator's movement
5. Check the vacuum hoses and the solenoid valve
6. Check the oil and the turbo shaft play before replacing it

Good to know

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

What each character of P01FE means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• 1: Air and fuel
• FE: Specific fault in that system

Frequently asked questions

Can I keep driving with code P01FE?

Drive without demanding power and go to a repair shop soon. If you see a lot of blue smoke or hear a metallic noise, shut off the engine.

What causes code P01FE?

The most common causes are: loose contact or corroded connector; wire breaking from vibration or heat; sensor erratic internally.

Related codes

• P00FCTurbocharger Outlet Pressure Sensor A Intermittent/Erratic
• P01FATurbocharger Outlet Pressure Sensor B Circuit
• P01FCTurbocharger Outlet Pressure Sensor B Circuit Low
• P01FDTurbocharger Outlet Pressure Sensor B Circuit High
• P025ETurbocharger/Supercharger Boost Sensor A Intermittent/Erratic

Sources

• law.cornell.edu: 13 CCR 1968.2
• fordservicecontent.com: OBD Operations Summary Gasoline 2020 2023
• gsi.ext.gm.com: 18OBDG03A Engine Diagnostics

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.