Powertrain, generic (extended)

P2288 Injector Control Pressure Too High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2288 reports that the injector control pressure itself, not just its reading, has climbed above the allowed maximum while the engine runs. Ford's 6.0L Power Stroke summaries put the limit at 27.5 MPa in the 2003 edition and 29.5 MPa in 2004, sustained for more than 3 s. For comparison, Ford's high-pressure oil pump normally works between about 3 and 25 MPa on that engine. Excessive pressure means the injection pressure regulator fails to release enough oil to drain, because it sticks, its coil is driven wrongly or the control signal is stuck; a sensor reading high but still within circuit limits can also mislead. The PCM limits fuelling to protect the injectors and oil system. P2290 is the too-low case; P2289 the same check with the engine off.

Likely causes

Injection pressure regulator valve stuck or contaminated
Fault in the regulator drive circuit holding it at high duty
ICP sensor reading higher than the actual pressure

Symptoms

  • Reduced power with fuel limit active
  • Loud injection noise or knocking
  • MIL on

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,200
Time1–5 h

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

Parts involved

injection pressure regulatorhigh pressure oil pump

Related codes

P2289P2290P2284P2623

References: fordservicecontent.com, fordservicecontent.com, en.wikipedia.org, patents.google.com.