Injector Control Pressure Regulator Circuit High
The P2625 code indicates that the Engine Control Module (ECM) has detected a voltage signal from the injector control pressure regulator circuit that is higher than the expected range. This regulator controls fuel pressure to the injectors in diesel engines, and a high voltage reading suggests a short to power, faulty regulator, or wiring issue. This can lead to incorrect fuel pressure, affecting engine performance and emissions.
1. Most Common Causes
- Short to voltage in the regulator control circuit wiring
- Faulty electrical connection or corroded terminals at the regulator connector
- Damaged injector pressure regulator with internal short circuit
- Failed powertrain control module (PCM)
- Incorrect ground reference or sensor voltage issue
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Reduced engine power and poor acceleration
- Excessive smoke from exhaust
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Visually inspect the injector control pressure regulator and its wiring for damage, corrosion, or loose connections.
Step 3: Test the regulator circuit voltage with a multimeter; compare to manufacturer specifications.
Step 4: If voltage is high, disconnect the regulator and check for short to power; repair as needed.
Step 5: If wiring is okay, replace the injector control pressure regulator.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause poor engine performance and potential damage to the fuel system or catalytic converter.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the specific vehicle and whether the regulator or wiring needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.