Injector Control Pressure Regulator Circuit/Open
The P2623 code indicates that the Engine Control Module (ECM) has detected an open circuit or malfunction in the injector control pressure regulator circuit. This regulator controls the fuel pressure supplied to the injectors, and an open circuit can cause improper fuel delivery, leading to performance issues. The code is typically triggered when the ECM detects a voltage or resistance outside the expected range in the regulator circuit.
01. Most Common Causes
- Faulty injector control pressure regulator
- Open or shorted wiring in the regulator circuit
- Poor electrical connection at the regulator or ECM
- Failed ECM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Reduced engine power or hesitation
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for related codes.
Step 2: Visually inspect the wiring and connector for damage, corrosion, or loose connections.
Step 3: Test the regulator circuit for continuity and proper voltage using a multimeter.
Step 4: If wiring is intact, test the regulator itself per manufacturer specifications.
Step 5: Replace the regulator if faulty; if not, check the ECM for issues.
04. Commonly Affected Makes
05. 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 catalytic converter or other components.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, including parts and labor, depending on the vehicle and the specific cause.