The Fuel Injection Control Pressure (ICP) Sensor monitors the high-pressure oil system in diesel engines, particularly in vehicles using HEUI (Hydraulic Electronic Unit Injector) systems. This sensor measures the pressure of the oil used to actuate the fuel injectors and sends the data to the engine control unit (ECU). The ECU then adjusts injector timing and fuel delivery based on the sensor’s readings to ensure efficient combustion. Accurate oil pressure data is essential for proper injector operation, fuel atomization, and overall diesel engine performance, especially under load or acceleration.
Common causes of Fuel Injection Control Pressure Sensor failure include:
• Oil contamination or sludge interfering with sensor accuracy
• Excessive engine heat causing internal damage
• Electrical connector corrosion or wiring faults
• Leaks in the high-pressure oil system
Symptoms of a failing Fuel Injection Control Pressure Sensor may include:
• Hard engine starting or no start
• Engine hesitation or rough idle
• Loss of power, especially under load
• Poor fuel economy
• Check Engine Light illuminated
The following OBD II error codes are the most commonly found with this product type. In an effort to reduce vehicle emissions, the Environmental Protection Agency (EPA) mandated that all vehicles manufactured after 1996 be equipped with OBD II (On-Board Diagnostics 2) technology. OBD II is now the standard in diagnosing vehicle emissions and system faults, and is implemented across all automotive manufacturers. The codes listed for this product type are common instances that may relate to your vehicle and should be used as a guide only. Walker Products will not be held responsible for any use of this information. It is highly suggested that you consult with a professionally trained mechanic prior to any automotive repair, and that you follow all vehicle manufacturer and EPA guidelines for removal, replacement, diagnostics, OBD II code clearing, ECU, and PCM relearn procedures.
o P0190 Fuel Rail Pressure Sensor Circuit
o P0191 Fuel Rail Pressure Sensor Circuit Range/Performance
o P0192 Fuel Rail Pressure Sensor Circuit Low
o P0193 Fuel Rail Pressure Sensor Circuit High
o P0194 Fuel Rail Pressure Sensor Circuit Intermittent
o P2283 Injector Control Pressure Too Low
o P2284 Injector Control Pressure Sensor Circuit Range/Performance
o P2285 Injector Control Pressure Sensor Circuit Low
o P2286 Injector Control Pressure Sensor Circuit High
o P2287 Injector Control Pressure Sensor Circuit Intermittent