Powertrain, generic (extended)

P2624 Injector Control Pressure Regulator Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2624 is reserved for a control circuit of the injection pressure regulator that sits too low, typically a ground short on the line switched by the PCM. No manufacturer documents this code publicly. On the 6.0 L Power Stroke, the best-known HEUI application, Ford reports every open or short of the IPR driver under P2623 alone, according to its OBD summaries up to 2009; International's HEUI engines like the DT466 use their own heavy-duty fault codes. CARB requires engines whose injection pressure is built hydraulically to have that pressure control monitored like a fuel system. A grounded IPR output can leave the valve permanently energised, so oil rail pressure may run high or the module shuts the output down. P2623 is the open circuit, P2625 the high fault.

Likely causes

IPR control wire chafed to ground near the valley or pump cover
Internally shorted IPR coil
Damaged driver stage in the PCM

Symptoms

  • Hard start or no-start
  • Rough running, knocking or erratic power
  • Malfunction indicator lamp on

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–900
Time0.5–4 h

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

Parts involved

icp regulatorwiring harness

Related codes

P2623P2625P2284P2288

References: law.cornell.edu, fordservicecontent.com, en.wikipedia.org.