What it means
Voltage on the ICP regulator control line is above the expected window. Typical causes are a short to battery or an open regulator coil.
At a glance
- Usually lights the check-engine light
How it works
The injector control pressure regulator circuit operates an electrically controlled regulator on vehicles that use injector-control pressure. P2625 means the module sees the control line above its expected electrical range, which can result from a short to battery voltage or an open regulator coil. It does not specify a particular injector or fuel-rail arrangement.
Common causes
Most likely first.
- Control wire shorted to B+
- Open regulator coil
- Connector pins corroded - high contact resistance
Symptoms
- Check-engine light
- Hard starting, rough running, or reduced engine power
How to diagnose it
- Review freeze-frame data and related codes to see whether the high-circuit fault is continuous or associated with starting or engine load.
- Inspect the regulator connector and harness for chafing against a powered wire, heat damage, loose plugs, or corrosion.
- Check connector pins for secure seating and signs of corrosion that could interrupt the regulator circuit.
- Use the wiring diagram to test whether the control wire is shorted to battery voltage, isolating harness sections to locate the fault.
- Test regulator coil continuity and compare the result with the manufacturer's specification; an open coil can produce a high circuit reading.
- If the wiring and regulator pass, test the module-side circuit and output according to the manufacturer's diagnostic procedure.
Common fixes
- Secure a loose connector and repair damaged or corroded terminals.
- Repair the control wire where it contacts a battery-voltage source.
- Replace the regulator if its coil is open.
- Repair heat-damaged or chafed harness sections and secure them away from powered wiring.
- Investigate a module fault only after verifying the regulator and circuit.
Can I keep driving?
A brief drive may be possible if the engine behaves normally, but hard starting or reduced power can leave you stranded or make merging unsafe. Avoid towing and high-load driving until the circuit is repaired.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.