Injector Control Pressure Too High - Engine Off
The P2289 code indicates that the Engine Control Module (ECM) has detected an excessively high fuel pressure in the injector control pressure system while the engine is off. This can be caused by a faulty fuel pressure regulator, a stuck open injector, or a malfunctioning high-pressure fuel pump. The condition may lead to fuel system damage or potential fire hazard if not addressed.
01. Most Common Causes
- Faulty fuel pressure regulator
- Stuck open fuel injector
- Malfunctioning high-pressure fuel pump
- Clogged fuel return line
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine may not start or starts hard
- Fuel odor from engine bay
- Possible fuel leak
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for related codes.
Step 2: Inspect fuel system for leaks, especially around injectors and fuel rail.
Step 3: Test fuel pressure with a gauge; compare to manufacturer specifications.
Step 4: Check fuel pressure regulator operation and vacuum lines.
Step 5: Perform injector leak-down test to identify stuck open injectors.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. High fuel pressure can cause fuel leaks, engine damage, or fire. Have the vehicle towed to a repair shop.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on the root cause and labor rates.