DTC Decoded: P2290

Ford DTC Code: P2290

Code Meaning: Diesel Injector Control Pressure Too High

What to Do About It: The diesel engine fuel injection system uses the Electronic Diesel Control (EDC) to control the delivery of fuel to the combustion chamber. It contains electronic sensors that register the conditions of the operation, an actuator or solenoid and the ECU of the engine. The sensors use physical inputs that are converted into outputs of the electrical signals, and the actuators convert the electrical output into a mechanical movement based on information sent to them by the ECU.

An engine code DTC P2284, P2288 or P2290 means that your injector control pressure is too high. There are a few self-tests you can perform to determine the cause of the code.

Diesel injectors

KOEO – Key On, Engine Off

KOER – Key On, Engine Running

If the codes P2284 or P2288 are present while you are in the KOEO mode or continuous memory DTCs, then here are some possible causes for the code:

  • Oil is incorrect or of the wrong viscosity
  • Oil quality is poor
  • No fuel or gelled fuel
  • Fuel pressure is low
  • ICP sensor is biased
  • A problem with the IPR valve
  • Oil system has a high-pressure leak
  • High-pressure in the oil pump
  • The PCM has a problem

You need to make sure you are using proper quality and viscosity oil, and the fuel grade is correct for the temperature conditions.

If while in the KOEO or KOER mode and these codes are not present, then check the following:

  • Look for a loose connection
  • Check for damaged or corroded terminals
  • Wiggle the harness to see if you can produce a code
  • Repair or replace worn, damaged connections
  • Tighten connections that are loose

Is Your Fuel and Oil Quality Okay?

YES - If yes, then check the fuel pressure by measuring it at the regulator block. Then measure the pressure at idle and with a wide open throttle and full load on the road. The fuel pressure should be 45 psi (310 kPa) at idle as a minimum and at 45 – 75 psi (310 – 482 kPa) with a wide open throttle and a full load. Next, you will need to check the fuel pressure.

NO - If the fuel and oil quality is not okay, then replace it with the proper oil or fuel and clear the DTCs. Repeat the self-test.

What is the Fuel Pressure?

Measure the fuel pressure both at the regulator block and on the open road with a full load and the throttle wide open. Fuel pressure should be 45 psi (310 kPa) minimum and 45-70 psi (310 – 482 kPa) at full load and wide open throttle.

Is your Fuel Pressure Correct?

YES – Perform the KOER on-demand self test and check for the DTC P2284 or P2288. If the code is present, then move to the ICP sensor. If the codes are not present, then check the voltage on the ICP PID sensor.

NO – Repair any fuel system problem, clear the DTCs and repeat the self-test.

ICP Sensor Check

With the KOEO, gain access to the PCM and check the ICP PID. If the voltage is between 0.15 and 0.35 volts, the next step is to check for oil aeration. If the voltage is not within the proper ranges, then replace the ICP sensor, clear the codes and repeat the self-test.

Oil Aeration Check

Start your engine, accelerate it to 3,300 RPMs, and hold it there for three minutes. Gain access to the PCM where you will monitor the ICP PID. If the injection control pressure increases more than 1,800 psi (12.4 MPa) then change the engine oil and repeat the self-test.

If the pressure increase is not more than 1,800 psi (12.4 MPa), then you need to check the IPR duty cycle.

IPR Duty Cycle Check While Under Vehicle Load

You will gain access to the PCM and then monitor the IPR PID while operating the vehicle at wide-open throttle and a full load on the road.

If the IPR duty cycle increases to 65 percent, then you will install a new IPR valve, clear the codes and do the self-test again.

If the IPR duty cycle does not increase to 65 percent, then you need to check for loose connections. Check for a damaged or corroded terminal. See if wiggling the harness will recreate the concern. Repair anything damaged or corroded. Tighten connections that are loose.

Super duty diesel rear

KOER On-Demand DTC P2284, P2288 or P2290

A DTC P2288 during self-test means the injection control pressure was above the desired pressure command.

A DTC P2284 or P2290 during self-test indicates that there is a difference between the command and the actual pressure.

Causes:

  • oil or viscosity is wrong
  • oil quality is poor
  • fuel is empty or gelled
  • fuel pressure is low
  • ICP sensor is biased
  • Oil system has a high-pressure leak
  • High-pressure in the oil pump
  • PCM is bad

Make sure that the oil viscosity and quality are good, and the fuel grade is correct for your temperature conditions.

If yes, then check the fuel pressure. If no, then replace the oil or fuel to the proper specifications.

Fuel Pressure Check

Measure your fuel pressure at the regulator block.

Measure your fuel pressure while idling and while driving with the throttle wide open and with a full load. The idle pressure should be 45 psi (310 kPa) at minimum and 45-70 psi (310 – 482 kPa) with a full load and the throttle wide open.

If the fuel pressure is within specs, then check the ICP sensor. If it is not within specs, the repair the system, clear the codes and repeat the self-test.

ICP Sensor Check

While in the KOEO mode, gain access to the PCM and do a monitor of the ICP PID.

If the voltage is within 0.15 and 0.35 volts, then check the oil for aeration. If the voltage is not within the proper limits, then replace the ICP, clear the codes and repeat the self-test.

Oil Aeration Check

For three minutes, accelerate your engine at wide-open throttle.

If the injection control pressure shows an increase better than 1,800 psi (12.4 MPa), then change the oil, clear the codes and repeat the self-test.

If the increase is not better than 1,800 psi (12.4 MPa), then repeat the self-test while checking the ICP sensor voltage.

ICP Sensor Voltage Check During Self-Test

When you perform the KOER self-test, the ICP is commanded high 2,465 psi (17 MPa), low 725 psi (5 MPa), then the EP is commanded high and low.

Between the ICP sensor and the harness on the engine, install a D94T-50-A or equivalent ICP/EBC adapter cable. Next, measure the voltage.

( + ) ICP Sensor Connector, Harness Side ( - )
ICP - Pin 3 Ground

Check to see if the voltage reading increases above 3 volts and then decreases around 1 volt during the ICP part of the KOER self-test.

If yes, and you see a DTC P2284 or P2288, then you need to check the PCM operation to make sure it is correct.

If no, then check the diagnostic routine hard starts or no start diagnostic procedure.

PCM Operation Check

Take the PCM connectors off and check the pins. You are looking for pushed out pins or pins that are corroded. Reconnect the PCM connectors and ensure that they are seating correctly. Next, carry out the PCM self-test to see if the problem is still there.

If it is still there, then install a new PCM. If the problem has been resolved, it may have been a loose connection.