Powertrain, generic (extended)

P2582 Turbocharger/Supercharger Speed Sensor A Circuit Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2582 points to a speed sensor A signal that cuts out or jumps for short moments while being fine in between, so the fault may be gone by the time the vehicle reaches the workshop. Loose terminals, a cracked wire that opens under vibration or heat, and a sensor failing internally when hot are the usual suspects. No manufacturer publishes P2582 under its own code; PACCAR's bulletin E209 on MX-11/MX-13 engines shows how hard such dropouts are to catch - its sensor fails intermittently, yet it is logged there under P2579, and the fix is a new sensor plus a 20-second high-idle check. CARB requires the boost-control electronics to be monitored for such faults. P2578, P2580 and P2581 describe faults that persist.

Likely causes

Loose or spread terminal in the sensor connector
Wire break that opens only under vibration or heat
Speed sensor A failing when hot

Symptoms

  • Brief power dips that come and go
  • Warning lamp that may switch off again
  • Turbo speed trace with dropouts or spikes

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–500
Time0.5–3 h

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

Parts involved

turbo speed sensor asensor wiring

Related codes

P2578P2579P2580P2581P2597

References: law.cornell.edu, static.nhtsa.gov.