Powertrain, generic · Fuel and air metering, auxiliary emission controls

P00FC Turbocharger Outlet Pressure Sensor A Intermittent/Erratic

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

The turbocharger outlet pressure sensor A measures the pressure directly after the compressor, usually ahead of the charge air cooler; FCA fits it as a combined temperature and pressure sensor. Boost control and compressor protection use the value. P00FC covers short dropouts or jumps in the signal that are each too brief for the low or high code, or changes faster than real pressure can move. Comparable intermittent monitors count range violations per drive cycle – Ford's MAP check, for example, sets after 25 events. The FCA case for the sibling code P00F9 was a sensor not fully seated with an unlatched connector, exactly the kind of fault that produces erratic signals; heat and vibration near the turbocharger add to it. GM and Ford do not use this code family in their published summaries – they rely on the boost sensor ahead of the throttle (P0235–P0238) – so no manufacturer document naming exactly this code was found.

Likely causes

Connector loose, not latched, or terminals corroded or spread
Harness chafed or broken near the turbocharger (heat, vibration)
Sensor with internal dropouts
Engine control module faulty

Symptoms

  • Check engine light on, possibly only after several drives
  • Occasional hesitation or brief loss of power under load
  • Fault comes and goes

Repair estimate

DifficultyEasyDIY possible
Parts and labour€20–250
Time0.3–1.5 h

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

Parts involved

turbocharger outlet pressure sensor asensor wiringsensor reference voltage

Related codes

P00F8P00F9P00FAP00FBP0237P0238

References: law.cornell.edu, static.nhtsa.gov, fordservicecontent.com, patents.google.com.