Cylinder 2 Injection Control Pressure Too Low

The engine's computer is not getting enough fuel pressure for cylinder 2, which can cause poor performance or stalling.

The engine control module (ECM) expects the fuel injection pressure to be around 5.0 to 6.0 MPa (722 to 870 psi) during operation. If the pressure drops below 4.5 MPa (652 psi), the code will trigger.

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

1. 11. Check the fuel level. If low, fill the tank and recheck the code. Decision: If code returns, continue to step 2.
2. 22. Inspect fuel lines for leaks or damages. Use visual inspection and feel for wet spots. Decision: If leaks found, repair them and clear the code. If no leaks, continue to step 3.
3. 33. Test the fuel pressure at the rail. Expected pressure is 5.0 to 6.0 MPa. Decision: If pressure is below 4.5 MPa, test the fuel pump and filter. If pressure is normal, continue to step 4.
4. 44. Check the fuel pressure sensor for proper voltage (should be near 0.5 to 4.5 volts). Decision: If voltage is out of range, replace the sensor. If voltage is correct, suspect injector issues.

• Faulty fuel pressure sensor
• Clogged fuel filter
• Fuel pump issues
• Leaky fuel lines
• Injector faults for cylinder 2

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