P2154 Fault Code

Fuel Injector Group C Supply Voltage Circuit High

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

The P2154 fault code indicates an issue with the fuel injector group C supply voltage circuit. This code is triggered when the engine control module (ECM) detects a voltage level that is higher than expected in the supply circuit for fuel injectors in group C. Proper voltage levels are critical for the fuel injectors to function correctly, ensuring optimal engine performance and efficiency.

What are the symptoms of the P2154 code?

The symptoms associated with a P2154 code may include:

• Engine misfires or poor engine performance
• Increased fuel consumption or rough idling
• Engine stalling or difficulty starting
• Potential activation of the check engine light on the dashboard
• Diagnostic trouble codes related to injector performance or other related systems

What causes the P2154 code?

Common causes for the P2154 code include:

• Short circuit or open circuit in the wiring harness connected to the fuel injectors
• Faulty fuel injectors that may be drawing excessive current
• Malfunctioning ECM or damaged connectors
• Faulty fuel injector relay or associated power source issues
• Internal wiring issues or corrosion in connectors

How to fix P2154?

To address the P2154 code, the following steps can be taken:

• Inspect and test the wiring and connectors related to the fuel injector group C supply circuit for any signs of damage, corrosion, or disconnection.
• Check the fuel injectors in group C for proper operation using a multimeter or injector tester. Replace any faulty injectors as necessary.
• Test the fuel injector relay for proper function and replace if faulty.
• Scan the vehicle with a diagnostic tool to clear the fault code after completing repairs and verify if the issue reoccurs during a road test.