What is OBD-II Code P2625 – Injector Control Pressure Regulator Circuit High

OBD-II Code P2625 – Injector Control Pressure Regulator Circuit High: Explanation and Repair

If you own a car or any type of vehicle, you must be familiar with the term OBD or On-board Diagnostics. The On-Board Diagnostic system in your vehicle works as an emission control system that ensures your vehicle meets the required emission standards. OBD-II is the second generation of On-Board Diagnostics that was introduced in the 1990s.

The OBD-II system monitors various vehicle parameters and stores any faults detected in the car’s computer memory in the form of Diagnostic Trouble codes (DTCs). These codes help mechanics like us to identify the exact issue the car is facing, which aids in the diagnosis and repair of the vehicle.

One of the many DTCs that we often come across is the P2625 code, which relates to Injector Control Pressure Regulator Circuit High. This code is usually associated with diesel engines.

In this article, we will explain what the P2625 code means, what causes it, and how you can repair your vehicle if it’s displaying this error code. We will also answer some frequently asked questions related to this code.

What is OBD-II Code P2625 – Injector Control Pressure Regulator Circuit High?

The P2625 OBD-II code indicates a fault in the vehicle’s fuel system. It specifically relates to the Injector Control Pressure Regulator (ICP) circuit, which is responsible for maintaining fuel pressure in the fuel rail. The ICP valve regulates the pressure of the high-pressure oil system, which then operates the fuel injectors. If the ICP valve is faulty or not functioning correctly, it can result in high pressure, which can damage the engine.

Since the fuel system is responsible for efficiently powering the engine, any malfunction in it, especially a high-pressure error, can cause severe damage to the engine or vehicle’s transmission system if it is left unrepaired.

Symptoms of P2625 Error Code

The most common symptoms of the P2625 error code are:

1. Check Engine Light: The first and most apparent symptom is the Check Engine Light (CEL) appearing on the dashboard. You may also notice an indicator light for low fuel pressure.

2. Rough idle: The engine may sound rough and might misfire or make a knocking sound while idling.

3. Reduced power: Your vehicle’s power may be reduced and have difficulty accelerating or reaching high speeds.

4. Fuel economy: You may experience reduced mileage or fuel economy as your engine consumes more fuel than it should, resulting in more frequent trips to the gas station.

Causes of P2625 Error Code

Now that we have discussed the symptoms of this code let’s look at some of the causes that trigger the P2625 error code in your vehicle. They include:

1. Malfunctioning ICP sensor: The most common reason for this DTC is a failure of the ICP sensor, which will send a high signal to the vehicle’s computer.

2. Damaged wiring: Damage to the wiring that connects the ICP or its sensor to the vehicle’s computer can also cause this code.

3. Faulty PCM: A malfunctioning Powertrain Control Module (PCM) can also result in a P2625 code.

4. Fuel injector issues: Fuel injectors that are dirty, clogged, or stuck can cause the ICP to produce erroneous pressure signals, which can trigger this code.

How to Repair P2625 Error Code?

Now that we know the symptoms and potential causes of the P2625 code, it’s essential to know how to make the needed repairs to your vehicle. Before attempting to repair your vehicle, make sure you read through your vehicle’s owner’s manual to ensure that you have the right tools, skills, and knowledge to carry out these repairs.

Here are some steps you can follow to repair P2625 error code:

1. Check the ICP sensor and wiring for damage: The first thing you should do when this code appears is to ensure that the wiring harness to the ICP sensor is correctly connected and free of damage. Check for any corrosion or damage to the electrical connections at the ICP sensor and the PCM.

2. Checking the Fuel Injectors: Check the fuel injectors for any blockage and cleanliness. Sometimes, the fuel injectors may have dirt build-up that can cause pressure issues in the fuel system. Replacing dirty injectors or cleaning them can help resolve the error code.

3. Inspect the ICP sensor: If the wiring connection and fuel injectors are clean, then the ICP sensor may be faulty. You can use a multimeter to check the voltage output of the sensor and compare it with the specifications provided in the vehicle’s service manual. Replace the sensor if the readings do not match the required voltage specifications.

4. Replace the PCM: If none of the above works, you may have to replace the PCM. This fix is expensive, so it’s better to leave this repair to an experienced mechanic.

Frequently Asked Questions (FAQs)

1. What is the function of the Injector Control Pressure Regulator?

The Injector Control Pressure Regulator (ICP) regulates the high-pressure oil system and, in turn, the fuel injectors. It ensures that the fuel pressure in the fuel rail is maintained.

2. Can I continue to drive my car with a P2625 error code?

It’s possible, but it’s not recommended. The P2625 code indicates a failure in the fuel system. If left unrepaired, it can cause severe engine or transmission damage, resulting in costly repairs.

3. Can a faulty ICP sensor cause other error codes?

Yes, a faulty ICP sensor can cause multiple error codes in your vehicle, including P0262, P0263, P0264, P0672, and P0683.

4. Do I need special tools to repair P2625 code myself?

You do not need special tools to repair a P2625 code. However, you will need a multimeter to test the ICP sensor’s voltage output and may need a scan tool to clear the code from the car’s computer memory.

5. How much does it cost to repair P2625 error code?

The cost of repairing a P2625 error code is difficult to estimate, as the repair costs depend on the severity of the issue and the complexity of the repairs. Generally, the cost of repairs can range from $100 to $500.


The P2625 code is an essential issue to address promptly to avoid severe engine or transmission damage. If you notice any of the symptoms discussed above, it’s best to take your vehicle to an experienced mechanic to diagnose and fix the issue. With the information provided in this article, you can better understand what the P2625 code means, its symptoms, possible causes, how to repair it, and frequently asked questions related to the code. By completing the repairs, you will save money in the long run as you avoid costly repairs due to engine failure.

Scroll to Top