Powertrain, generic (extended)

P25E6 "B" Camshaft Position - Stuck In Locked Position (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P25E6 tells that on bank 2 the exhaust cam phaser has not left its locked angle despite a command to adjust. The module then has one exhaust camshaft that can no longer be phased, which shifts valve overlap on that bank and can upset idle quality and the emissions balance between the two banks. Ford's 2014 list for the Boss 302S V8 includes P25E6 as a lamp code, together with the matching intake and bank 1 codes. The root causes resemble those of the other stuck-lock codes but should be checked on the bank 2 side specifically: oil feed and screen to that head, the bank 2 exhaust control valve and the phaser itself. CARB obliges OBD systems to flag VVT systems that do not reach their target angle. Expect the warning lamp, reduced power and possibly a rattle from the timing drive.

Likely causes

Restricted oil feed or clogged screen to the bank 2 cylinder head
Bank 2 exhaust oil control valve stuck
Lock pin seized in the bank 2 exhaust phaser

Symptoms

  • Check engine lamp on
  • Reduced power, uneven idle
  • Rattle from the timing drive

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–1,600
Time0.5–7 h

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

Parts involved

cam phaser b b2park lock pinoil control valve

Related codes

P25E3P25E7P25E8P0024P0023

References: performanceparts.ford.com, law.cornell.edu.