Power Stroke OBD-II Code P1211 – “ICP Higher/Lower Than Desired” (7.3L)
OBD-II Code P1211 from a 7.3 Liter Power Stroke is often caused by running “Hot Chips” or tunes that are demanding more ICP (Injection Control Pressure) than the HPOP (High Pressure Oil Pump) can deliver and can be accompanied by a lack of power or rough running. For what it’s worth, these are the exact parameters that trigger this code:
ICP 410psi Higher Than Desired for 7 Seconds
ICP 280psi Lower Than Desired for 7 Seconds
Code P1211 can also be caused by legitimate High Pressure Oil System issues. Below is a list of some of the causes:
- Failed or Sticking IPR (Injection Pressure Regulator)
- Failed or Weak HPOP (High Pressure Oil Pump)
- Any Leak in High Pressure Oil System (o-ring, stuck injector, etc.)
- Low Fuel Pressure (Rare)
- P1280 / P1281 / P1283 – (7.3L)
The above codes are related to ICP also. If the SES (Service Engine Soon) light is on and these codes are present, the ICP reading through any scantool will not be accurate as the PCM is using a “default” ICP value. These codes are all “electrical” in nature. Common causes are shorts between the Red and White IPR wires or between the Red IPR wire and ground. These can also sometimes indicate a PCM problem.
Ford 7.3 Power Stroke diesel, code P1211, lacks power because of fuel restriction due to a failed fuel tank.