What Does P2625 Mean?
The PCM has detected abnormally high voltage or current in the injector control pressure regulator circuit. This indicates a short to power or an open ground in the fuel pressure control system.
Safety Warning
Uncontrolled fuel pressure may cause engine damage, excessive smoke, or sudden power loss. Have vehicle towed to prevent catastrophic fuel system failure.
Common Causes
30%
Wiring shorted to battery voltage in pressure regulator circuit
25%
Open or poor ground connection for injector pressure regulator
25%
Failed injector control pressure regulator with internal open circuit
20%
PCM internal fault with failed driver circuit
Diagnostic Steps
1
Step 1: Check and clean all ground connections for fuel injection system and PCM
2
Step 2: Disconnect pressure regulator and check for unwanted voltage on control circuit (should be 0V key off)
3
Step 3: Inspect wiring harness for damage or shorts to power, especially near high-current circuits
4
Step 4: Measure ground circuit continuity and resistance (should be <0.5 ohms to battery negative)
5
Step 5: Test PCM output signal with oscilloscope to verify proper voltage range and PWM frequency
Estimated Repair Cost
$250 - $1,500
Parts + labor, varies by vehicle and location
The PCM has detected abnormally high voltage or current in the injector control pressure regulator circuit. This indicates a short to power or an open ground in the fuel pressure control system.
The most common cause of P2625 (Injector Control Pressure Regulator Circuit High) is: Wiring shorted to battery voltage in pressure regulator circuit
Typical repair costs for P2625 range from $250 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Uncontrolled fuel pressure may cause engine damage, excessive smoke, or sudden power loss. Have vehicle towed to prevent catastrophic fuel system failure.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2625 to identify the root cause.
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Quick Info
Category
Powertrain
System
Diesel Fuel Injection System
Difficulty
Type
Generic (SAE)
Recommended Tools
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