The P2289: Injector Control Pressure Too High – Engine Off indicates that the fuel injector control pressure is excessively high even when the engine is turned off. This could be due to a faulty pressure sensor or control valve that is failing to release pressure properly, or other issues with fuel system components. High pressure while the engine is off can lead to starting issues and potential damage to fuel system parts.
P2289 – Quick Overview
Code | Information |
---|---|
Meaning | P2289: Injector Control Pressure Too High – Engine Off |
Is it serious? | Yes, excessive pressure when the engine is off can lead to difficulty starting, excessive fuel consumption, or even damage to fuel system components. |
Possible causes | – High pressure in the injector control system when the engine is off – Faulty pressure sensor or control valve – Issues with fuel system components |
How to diagnose? | – Measure injector control pressure when the engine is off – Test the pressure sensor and control valve – Inspect fuel system components for faults |
P2289 Meaning
The P2289: Injector Control Pressure Too High – Engine Off code indicates that the pressure in the fuel injector control system remains too high even after the engine has been shut down. This typically points to a problem where the pressure is not being relieved properly, which may involve a malfunctioning pressure sensor, a stuck control valve, or issues with other components like the fuel pressure regulator. Proper pressure control is crucial for safe and efficient engine operation, especially during startup.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to determine if there are any additional related codes present that could provide more context for issues in the fuel system. | OBD-II Scanner |
Measure Injector Control Pressure When Engine is Off | Use a fuel pressure gauge to measure the injector control pressure while the engine is off. Compare the pressure against the manufacturer’s specified value to determine if it remains excessively high. | Fuel Pressure Gauge |
Inspect and Test the Pressure Sensor | Inspect the injector control pressure sensor for signs of physical damage, corrosion, or loose connections. Use a diagnostic tool to test the sensor’s output to determine if it is providing accurate readings when the engine is off. | Flashlight, Multimeter, Diagnostic Tool |
Test the Pressure Control Valve | Test the injector pressure control valve to ensure it is working properly. If it is stuck in the closed position, it can prevent the release of fuel pressure when the engine shuts down. | Multimeter, Hand Tools |
Inspect the Fuel Pressure Regulator | Check the fuel pressure regulator to make sure it is operating correctly. A faulty regulator may not relieve excess pressure, leading to high fuel pressure even when the engine is off. | Fuel Pressure Gauge, Hand Tools |
Check Fuel Lines for Blockages | Inspect the fuel lines for any blockages or kinks that could prevent fuel from returning to the tank or being properly released from the system. Ensure that return lines are free of obstructions. | Flashlight, Hand Tools |
Verify Fuel Pump Shutoff | Ensure that the fuel pump is not continuing to run after the engine is turned off. This could cause an increase in pressure that should not be present when the engine is off. | Diagnostic Tool |
Replace Faulty Components | If the sensor, pressure control valve, or other fuel system components are found to be faulty, replace them with OEM parts to restore proper functionality. | Replacement Parts, Hand Tools |
Clear the Code and Test Drive | After making the necessary repairs, clear the code using an OBD-II scanner. Then, start and stop the vehicle, monitoring the injector control pressure to ensure that the pressure is being relieved properly. | OBD-II Scanner, Vehicle Owner’s Manual |
Recheck for Codes | After testing, re-scan the vehicle to verify that the P2289 code has not returned. If it does reappear, further diagnostics may be required to inspect deeper issues in the fuel system. | OBD-II Scanner |

OBD-II scanner Buyer’s Guide
- Scanner features explained
- Different types of scanners
- Scanners for coding/odometer/ECU/checks
- Best picks + discount codes

Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)