P2625 — Injector Control Pressure Regulator Circuit High
powertrain (engine/transmission)
Is it safe to drive?
Drive with caution Drive with caution. Mixture and fuel-pressure faults can cause stalling, hesitation in traffic and — when severe — catalyst damage. Avoid long trips until diagnosed.
How to diagnose with an OBD scanner
- Read the code and freeze frame Connect an OBD2 scanner, confirm P2625 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the fuel delivery and mixture control for damage, corrosion, chafing or poor contact.
- Subsystem check With the injector control pressure regulator disconnected, measure signal voltage at the harness connector: a high reading with the component unplugged indicates a short to power in the harness; if it drops to normal, the component itself is faulty.
- Subsystem check Measure fuel pressure at the rail and compare with factory specification at idle and under load.
- Subsystem check Check short-term and long-term fuel trims in live data to see which way the mixture is off.
- Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2625 does not return.
Approximate repair cost
Repair cost depends on which component actually failed. Typical scenarios for P2625 (parts and labor, USD, independent shop rates): Clean or replace injectors: $200–$800; Replace the fuel filter: $80–$200; Replace the pressure regulator or sensor: $150–$450; Replace the fuel pump: $400–$900. Overall, fixing P2625 usually costs between $80 and $900. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Common questions
Is it safe to drive with P2625?
Drive with caution. Mixture and fuel-pressure faults can cause stalling, hesitation in traffic and — when severe — catalyst damage. Avoid long trips until diagnosed.
Will P2625 clear itself?
Sometimes P2625 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.
What is the most common cause of P2625?
The most common causes are: weak fuel pump or clogged fuel filter, faulty fuel rail pressure sensor or wiring, contaminated or incorrect fuel.
How do I diagnose P2625 myself?
Start with a scan: confirm P2625, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the injector control pressure regulator, and verify the suspect component against live data before buying parts.
How much does it cost to fix P2625?
Clean or replace injectors — $200–$800; Replace the fuel filter — $80–$200; Replace the pressure regulator or sensor — $150–$450; Replace the fuel pump — $400–$900. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.
What does P2625 mean?
When P2625 appears on a scan, it means the control module has flagged a problem in the fuel delivery and mixture control: injector control pressure regulator circuit high. The fault sits in the powertrain (engine/transmission) group of the OBD2 standard.
“Circuit high” means the control module sees a voltage on the injector control pressure regulator circuit that is above the expected range — typically close to battery voltage. Physically this points to a short to a power feed, a broken ground return, or a failed component pulling the signal line high.
This code does not appear from a single bad reading: the module must see the fault condition repeat under defined operating conditions before it turns on the warning light. The freeze frame captured with P2625 — engine load, rpm, temperature, speed — tells you exactly when the problem occurs, so reproduce those conditions when testing.
Common symptoms of P2625
- increased fuel consumption
- Check Engine Light on
- fuel smell in severe cases
- loss of power under load
- hard starting or long cranking
- rough idle and hesitation
What causes P2625?
- failed injector control pressure regulator pulling the signal high
- signal wire shorted to battery positive
- open ground return of the injector control pressure regulator
- clogged or leaking fuel injectors
- contaminated or incorrect fuel
- faulty fuel rail pressure sensor or wiring
- weak fuel pump or clogged fuel filter
- faulty fuel pressure regulator
- vacuum or intake leaks skewing the mixture
How to diagnose P2625
- Connect an OBD2 scanner, confirm P2625 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
- Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
- Visually inspect the wiring harness and connectors related to the fuel delivery and mixture control for damage, corrosion, chafing or poor contact.
- With the injector control pressure regulator disconnected, measure signal voltage at the harness connector: a high reading with the component unplugged indicates a short to power in the harness; if it drops to normal, the component itself is faulty.
- Measure fuel pressure at the rail and compare with factory specification at idle and under load.
- Check short-term and long-term fuel trims in live data to see which way the mixture is off.
- Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2625 does not return.
How to fix P2625
Start with the cheapest and most common causes before replacing expensive parts:
- Clean or replace injectors — $200–$800
- Replace the fuel filter — $80–$200
- Replace the pressure regulator or sensor — $150–$450
- Replace the fuel pump — $400–$900
How much does it cost to fix P2625?
Repair cost depends on which component actually failed. Typical scenarios for P2625 (parts and labor, USD, independent shop rates):
- Clean or replace injectors: $200–$800
- Replace the fuel filter: $80–$200
- Replace the pressure regulator or sensor: $150–$450
- Replace the fuel pump: $400–$900
Overall, fixing P2625 usually costs between $80 and $900. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.
Can you drive with P2625?
Drive with caution. Mixture and fuel-pressure faults can cause stalling, hesitation in traffic and — when severe — catalyst damage. Avoid long trips until diagnosed.