Injector Control Pressure Regulator Circuit High
The P2625 code means the vehicle's onboard diagnostic system has detected: Injector Control Pressure Regulator Circuit High. This is a critical severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- hard
- Estimated cost
- $200 - $1200 (parts and labor)
Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.
Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.
Affiliate links — we earn a commission at no extra cost to you.
What Are the Symptoms of P2625?
- Excessively high injection pressure
- Harsh engine running
- Injector seal leaks from over-pressure
- Loud diesel knock
What Causes P2625? (Most Likely First)
- IPR valve stuck closed building excess pressure Very High
- Short to voltage in IPR control circuit High
- ECM commanding full pressure erroneously Moderate
- Blocked oil drain passage from IPR Low
Can I Still Drive with P2625?
No — stop driving. P2625 is rated critical severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.
Frequently Asked Questions
Can high ICP damage injectors?
Yes. Excessive injection control pressure can overwhelm injector seals, cause injector stiction, and lead to premature injector failure.
What does diesel knock indicate with P2625?
Over-pressurized injectors deliver too much fuel too aggressively, causing excessively rapid combustion that produces the characteristic knocking sound.
How do I release excess ICP pressure safely?
Turn off the engine and wait for pressure to bleed down naturally. Do not attempt to open the high-pressure oil system while pressurized.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2625?
-
Monitor ICP pressure for over-pressure condition
-
Test IPR valve solenoid for stuck position
-
Check IPR control circuit for short to power
-
Inspect IPR oil drain for blockage
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P2625?
- 2003-2010 Ford F-250 6.0L Diesel
- 2008-2018 Ford F-250 6.4L Diesel
- 2011-2019 Ford F-350 6.7L Diesel
- 2005-2010 Ford E-450 6.0L Diesel
Explore More
Was this helpful?
Send this to whoever is fixing the car — your mechanic, or the person asking what the light means.