Powertrain, generic (extended)

P25E2 "A" Camshaft Position Control Performance (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P25E2 points to poor position control of the bank 2 intake camshaft actuator: the measured angle tracks its target less accurately or with more oscillation than the calibration allows, while no clear lock fault is present. It is the bank 2 sibling of P25DF. No manufacturer publishes its trigger, so it remains unclear how it is separated from P0021 (bank 2 over-advanced or system performance) or the slow response code P000C; when one of those is stored too, it usually guides the diagnosis. CARB 13 CCR 1968.2 wants every VVT system checked for missed setpoints and for being too slow. In hydraulic phasers of the mid-lock type, as BorgWarner supplies for the Hyundai Gamma II, contaminated oil, a weak solenoid valve or internal leakage reduce control precision. Symptoms tend to be mild: unsteady idle and lower efficiency.

Likely causes

Bank 2 intake solenoid valve worn or sluggish
Contaminated or overdue engine oil
Internal leakage across the phaser vanes

Symptoms

  • Check engine lamp on
  • Slightly unsteady idle
  • Lower fuel economy

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–1,200
Time0.5–5 h

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

Parts involved

cam phaser a b2oil control valvecam position sensor

Related codes

P25DFP25E0P25E1P0021P0022P000C

References: law.cornell.edu, borgwarner.com.