Powertrain, generic (extended)

P2ABA Wastegate Position Sensor B Circuit

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P2ABA covers a general circuit fault of the position sensor on the wastegate of turbocharger B, so it can only occur on engines with two turbos and electric wastegates: on a parallel layout the turbo of bank 2, on a series layout the second one downstream. Ford uses it on twin-turbo EcoBoost V6 engines. TSB 22-2357 reprograms 2021-22 F-150 2.7L trucks that log P2ABA, P2ABC, P2AB7 or P2AB9 because of software parameters; TSB 23-2353 and the later SSM 54083 cover 2020-23 Explorer, 2022-23 F-150 and 2023-24 Expedition/Navigator, first with a software update and then with the workshop manual pinpoint tests. No limit is published for this general code. CARB lists wastegate valve position among the data items an OBD system must report. Low/high are P2ABB/P2ABC.

Likely causes

PCM calibration that sets the code falsely (Ford reflash for listed models)

Damaged harness or connector at the bank 2 turbocharger

Electric wastegate actuator B with its built-in position sensor failed

Symptoms

Check engine light, on Ford also the powertrain (wrench) indicator
Reduced power, boost limited

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€0–900

Time0.5–3 h

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

Parts involved

wastegate position sensor bwiring harnessecm

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