Powertrain, generic (extended)

P2B82 Wastegate Position Sensor B Circuit Performance

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P2B82 is the performance fault for the second electric wastegate, found only on engines with two turbochargers and position-controlled wastegates. No manufacturer documents this exact code publicly. By analogy with GM's checks for wastegate A (P2B81 in 19OBDG03D), the computer would flag lasting gaps between commanded and measured position, or a motor that needs abnormal current or duty cycle to hold its target. GM letters a parallel layout so that charger A sits on bank 1, which would put B on bank 2. Ford's patent US9243553B2 adds that heat changes linkage length and shifts the sensor reading, so a worn or binding linkage can mimic a sensor fault. Circuit faults on side B are P2ABA to P2ABC; the stuck-type counterpart is P0248.

Likely causes

Wastegate valve B or linkage binding from heat and deposits

Actuator B worn, gear or motor weak

Loose linkage or retaining clip

Symptoms

Warning lamp with stored code
Uneven or reduced boost, weaker pull

Repair estimate

DifficultyHardWorkshop job

Parts and labour€150–2,500

Time1–5 h

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

Parts involved

wastegate position sensor bwastegate actuatorecm

References: law.cornell.edu, gsi.ext.gm.com, patents.google.com.