What is OBD-II Code P2290 – Injector Control Pressure Too Low

What is OBD-II Code P2290 – Injector Control Pressure Too Low?

As a mechanic, one of the most common issues that I’ve come across in the workshop is cars showing the OBD-II code P2290 – Injector Control Pressure Too Low. OBD-II stands for Onboard Diagnostics II, and this system helps monitor your vehicle’s engine and emissions control systems. When your car’s computer detects an issue, it logs a diagnostic trouble code (DTC) in its memory, which is identified by a five-digit code. For example, P2290 is a code that indicates a problem with the injector control pressure being too low.

When this code is triggered, it means that the fuel injector system is not receiving enough pressure and is not performing as it should. The fuel injector system in your vehicle consists of a fuel pump, a fuel filter, and injectors. These components work in tandem to deliver fuel to the engine, which then combusts the fuel to produce power and drive the wheels. If there is an issue with the fuel injector system, it could lead to poor fuel economy, reduced power, and even complete engine failure.

What are the Causes of P2290 Code and How to Repair It?

The root cause of P2290 is usually one or more of the following:

– Low fuel pressure caused by a faulty fuel filter, fuel pump, or fuel pressure regulator
– Leakage in the fuel system
– A problem with the fuel injector(s)
– A malfunction in the engine control module (ECM)
– An issue with the wiring or connectors that are related to the fuel injector circuit

To determine the cause of the issue, a mechanic will need to perform a series of tests on your vehicle. They will start by checking the fuel pressure using specialized tools, such as a fuel pressure gauge. If the pressure is too low, it could indicate a faulty fuel pump, fuel filter, or pressure regulator. If there are fuel leaks present, the mechanic will use a smoke machine or other diagnostic tools to locate and repair the source of the leak.

If these tests come back clear, the mechanic will then move on to inspecting the fuel injector(s) and the fuel injector wiring and connectors. They will look for signs of damage, wear and tear, or corrosion, and some parts may need to be replaced. The fuel injectors themselves may need to be removed and cleaned or replaced if they are found to be faulty.

Lastly, the mechanic will inspect the ECM and its wiring and connectors. If the ECM is malfunctioning, it may need to be reprogrammed or replaced.

Case Study: P2290 Code on a 2009 Ford F350 Super Duty

Recently, a customer came to my workshop with a 2009 Ford F350 Super Duty that was showing the P2290 code. They had reported that their vehicle was running poorly and had reduced power and fuel economy compared to before.

Upon inspecting the vehicle, I found that the fuel pressure was very low at the injectors. I first suspected the fuel pump, but after testing, I found it to be working just fine. I then proceeded to inspect the fuel filter and found that it was severely clogged and needed to be replaced.

After replacing the fuel filter, I retested the vehicle and found the fuel pressure to be satisfactory. Unfortunately, the problem persisted, which meant that there was something else that was causing the issue.

Further inspection showed that one of the fuel injectors was faulty, and it was not opening correctly, which led to a lack of fuel getting to the engine. I ended up removing and replacing the entire set of injectors, and that solved the problem completely. The engine now ran smoothly, and the P2290 code did not reappear.


1. How dangerous is driving with a P2290 code?

Driving with a P2290 code can be dangerous, especially if the problem relates to a fuel leak. This could lead to a fire hazard if the fuel comes in contact with a hot surface. If you experience this code, it’s best to have your vehicle inspected by a mechanic immediately.

2. Can a P2290 code cause engine damage?

If left unaddressed, a P2290 code can cause engine damage, especially if it relates to a fuel delivery issue. This can lead to engine overheating, misfiring, and poor fuel economy. If you experience this code, it’s best to have your vehicle inspected by a mechanic as soon as possible.

3. How much does it typically cost to repair a P2290 code?

The cost to repair a P2290 code can vary depending on the underlying issue. Simple fixes such as replacing the fuel filter or cleaning the injectors can cost as little as a few hundred dollars, while more complicated issues such as issues with the fuel pump or ECM can cost several thousand dollars.

4. How often should I have my vehicle scanned for diagnostic trouble codes?

It’s recommended to have your vehicle scanned for diagnostic trouble codes at least once a year, especially if your vehicle is an older model or has experienced issues in the past. Regular inspections can help identify any issues early and prevent serious damage.

5. Can I reset the P2290 code on my own?

Yes, you can reset the P2290 code on your own, but it’s generally not recommended. Resetting the code will not fix the underlying issue, and the code is likely to reappear. It’s best to have your vehicle inspected by a mechanic to identify and repair the underlying issue.

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