P2624 — Injector Control Pressure Regulator Circuit Low
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 P2624 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 Check for supply voltage at the injector control pressure regulator connector first; then measure resistance from the signal wire to ground — near-zero ohms confirms a short to ground in the harness.
- 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 P2624 does not return.
Approximate repair cost
Repair cost depends on which component actually failed. Typical scenarios for P2624 (parts and labor, USD, independent shop rates): Replace the pressure regulator or sensor: $150–$450; Clean or replace injectors: $200–$800; Replace the fuel pump: $400–$900; Replace the fuel filter: $80–$200. Overall, fixing P2624 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
What are the symptoms of P2624?
Drivers most often notice: increased fuel consumption, Check Engine Light on, hard starting or long cranking, fuel smell in severe cases.
How much does it cost to fix P2624?
Replace the pressure regulator or sensor — $150–$450; Clean or replace injectors — $200–$800; Replace the fuel pump — $400–$900; Replace the fuel filter — $80–$200. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.
What does OBD2 code P2624 mean?
Injector Control Pressure Regulator Circuit Low (P2624): a powertrain (engine/transmission) fault affecting the fuel delivery and mixture control. Short, gentle driving to a shop is usually possible. Most often caused by vacuum or intake leaks skewing the mixture, faulty fuel pressure regulator, faulty fuel rail pressure sensor or wiring.
What is the most common cause of P2624?
The most common causes are: vacuum or intake leaks skewing the mixture, faulty fuel pressure regulator, faulty fuel rail pressure sensor or wiring.
Will P2624 clear itself?
Sometimes P2624 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 does P2624 mean?
The engine control module sets P2624 when it detects a fault in the fuel delivery and mixture control. In practical terms: injector control pressure regulator circuit low. The code belongs to the powertrain (engine/transmission) group of OBD2 codes.
“Circuit low” means the voltage on the injector control pressure regulator circuit stays below the expected minimum — close to ground. The usual physical reasons are a short to ground, a chafed wire touching metal, a missing supply voltage, or a failed component dragging the signal down.
To set P2624, the control module compares live readings of the fuel delivery and mixture control against calibrated limits, usually over several drive cycles. Alongside the code it stores a freeze frame — a snapshot of rpm, load, coolant temperature and vehicle speed at the moment of failure. Reading that snapshot first saves diagnostic time.
Common symptoms of P2624
- increased fuel consumption
- Check Engine Light on
- hard starting or long cranking
- fuel smell in severe cases
- loss of power under load
- rough idle and hesitation
What causes P2624?
- failed injector control pressure regulator pulling the signal low
- signal wire shorted to ground (chafed insulation)
- missing supply voltage to the injector control pressure regulator
- faulty fuel rail pressure sensor or wiring
- faulty fuel pressure regulator
- vacuum or intake leaks skewing the mixture
- contaminated or incorrect fuel
How to diagnose P2624
- Connect an OBD2 scanner, confirm P2624 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.
- Check for supply voltage at the injector control pressure regulator connector first; then measure resistance from the signal wire to ground — near-zero ohms confirms a short to ground in the harness.
- 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 P2624 does not return.
How to fix P2624
Start with the cheapest and most common causes before replacing expensive parts:
- Replace the pressure regulator or sensor — $150–$450
- Clean or replace injectors — $200–$800
- Replace the fuel pump — $400–$900
- Replace the fuel filter — $80–$200
How much does it cost to fix P2624?
Repair cost depends on which component actually failed. Typical scenarios for P2624 (parts and labor, USD, independent shop rates):
- Replace the pressure regulator or sensor: $150–$450
- Clean or replace injectors: $200–$800
- Replace the fuel pump: $400–$900
- Replace the fuel filter: $80–$200
Overall, fixing P2624 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 P2624?
Drive with caution. Mixture and fuel-pressure faults can cause stalling, hesitation in traffic and — when severe — catalyst damage. Avoid long trips until diagnosed.