P2624Injector Control Pressure Regulator Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Hard start or no-start
- Rough running, knocking or erratic power
- Malfunction indicator lamp on
- Likely causes
- LikelyIPR control wire chafed to ground near the valley or pump cover
- PossibleInternally shorted IPR coil
- RareDamaged driver stage in the PCM
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.