P2155 Fault Code

Fuel Injector Group D Supply Voltage Circuit/Open

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2155 fault code indicates a problem with the fuel injector group D supply voltage circuit. This code is triggered when the Engine Control Module (ECM) detects an issue such as an open circuit or insufficient voltage supply to the fuel injectors in group D.

• Possible Occurrences: This can happen due to wiring issues, a faulty fuel injector, or a malfunctioning ECM.
• Impact: When this fault code is present, it can lead to poor engine performance, increased emissions, and potentially cause engine stalling due to inadequate fuel delivery.

What are the symptoms of the P2155 code?

When the P2155 code is active, you might observe the following symptoms:

• Engine Performance Issues: The vehicle may experience rough idling, reduced power, or misfiring.
• Increased Fuel Consumption: A drop in fuel efficiency due to improper fuel delivery.
• Check Engine Light: The dashboard check engine light will illuminate, indicating an issue that requires attention.
• Difficulties Starting: The engine may struggle to start or fail to start altogether due to inadequate fuel supply to the injectors.

What causes the P2155 code?

Several factors can lead to the P2155 code being triggered:

• Wiring Issues: Damaged or corroded wiring and connectors leading to the fuel injector circuit may interrupt the voltage supply.
• Faulty Fuel Injector: A defective fuel injector itself that cannot operate as intended.
• ECM Malfunction: The engine control module might have internal faults that prevent it from correctly managing voltage delivery to the fuel injectors.
• Blown Fuse: A blown fuse in the fuel injector circuit can cut power, causing the circuit to open.

How to fix P2155?

Resolving the P2155 fault code may involve several diagnostic and repair steps:

• Visual Inspection: Begin with a thorough visual inspection of the wiring and connectors for any signs of damage or corrosion.
• Test and Repair Wiring: Use a multimeter to check for continuity and voltage supply to the fuel injector circuit. Repair any identified issues.
• Replace Faulty Components: If the fuel injector is found to be faulty, it should be replaced. Additionally, replace any blown fuses.
• ECM Testing/Replacement: If all wiring and injectors are functional, the ECM should be diagnosed, as it may need reprogramming or replacement if defective.
• Clear Codes and Test Drive: After any repairs, clear the fault codes and conduct a test drive to ensure the issue is resolved.