Powertrain, generic · Fuel and air metering

P015F Excessive Time to Enter Closed Loop Cylinder Balance Control

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

Cylinder balance control evens out the contribution of individual cylinders – on diesels by adjusting each injector's quantity based on crankshaft speed fluctuations. P015F, by its title, is set when this closed-loop control does not become active within the expected time after starting, for example because the crankshaft wheel has not been learned or the conditions are missing. No manufacturer using P015F was found: Ford's 2023 diesels run cylinder balancing (maximum correction 3.5–15 mg per stroke) but report problems as P0263–P0284. The description therefore rests on CARB's requirement for feedback controls and that comparable function; causes are derived, not documented.

Likely causes

Crankshaft wheel adaptation not learned or speed signal disturbed
Injector deviating strongly or injector circuit fault
Control module software

Symptoms

  • Check engine light on
  • Possibly rough idle
  • Often no symptoms

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–1,500
Time0.5–5 h

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

Parts involved

fuel injectorscrankshaft position sensorengine control module

Related codes

P015EP016AP016DP0263P219A

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