P2554 Fault Code

Throttle/Fuel Inhibit Circuit Low

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

The P2554 fault code indicates an issue with the Throttle/Fuel Inhibit Circuit being too low. This code typically pertains to the powertrain control module (PCM) detecting an out-of-range signal from the throttle or fuel system. It signifies that the throttle control is not functioning as intended, which can lead to reduced engine performance or stalling. Understanding this code is vital for diagnosing issues related to throttle response and fuel delivery.

What are the symptoms of the P2554 code?

• Reduced engine power
• Engine stalling or hesitation
• Poor fuel economy
• Warning light on the dashboard (Check Engine Light)
• Unresponsive throttle when pressed
• Irregular engine idle speed

What causes the P2554 code?

• Faulty throttle position sensor (TPS)
• Short circuit or opens in the throttle control circuit
• Damaged wiring harness or connectors
• Issues with the PCM
• Vacuum leaks in the intake system
• Malfunctioning fuel injectors

How to fix P2554?

• Inspect and test the throttle position sensor for proper operation and replace if necessary.
• Check and repair any wiring issues or poor connections in the throttle control circuit.
• Examine the intake system for vacuum leaks that could affect throttle performance.
• Verify the functionality of fuel injectors and replace any that are malfunctioning.
• Reflash or replace the PCM if it is found to be at fault.