Powertrain, generic (extended)

P228F Fuel Pressure Regulator A Exceeded Learning Limits - Too High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P228F is the upper counterpart of P228E: the learned correction for fuel pressure regulator A has run into its maximum. Ford's 2023 diesel summary applies one test to both codes on the 3.0 L and 6.7 L engines, with a limit near a 20 % rail pressure sensor slope error and about 10 s of monitoring at 600 bar or more. In heavy trucks, Volvo and Mack solutions K01029637 and K40914241 group P228F with P0087 and P016F for 11 L and 13 L common-rail engines; one cause they name is a damaged sealing lip on the second-stage filter that lets dirt reach the high-pressure side. Jaguar Land Rover message SSM 74588 lists P228F on the supercharged AJ126 petrol V6 together with high-pressure pump noise. Expect the MIL, possibly with rough running.

Likely causes

Dirt in the high-pressure system, e.g. via a leaking fuel filter seal
High-pressure pump worn or noisy
Rail pressure sensor characteristic drifted
Low-pressure supply restricted

Symptoms

  • Check engine light
  • Noise from the high-pressure pump
  • Uneven running in some cases

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–2,500
Time0.5–5 h

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

Parts involved

fuel pressure regulator

Related codes

P228EP229DP016FP0087P0094

References: fordservicecontent.com, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.