P2552 Fault Code

Throttle/Fuel Inhibit Circuit

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

The P2552 fault code relates to the Throttle/Fuel Inhibit Circuit, which plays a crucial role in controlling the engine's throttle response and fuel delivery. This circuit ensures that the throttle body operates correctly and that fuel injection is optimized for performance and efficiency. When issues arise in this circuit, the vehicle's engine may experience reduced power output, increased emissions, and poor acceleration.

What are the symptoms of the P2552 code?

Drivers may notice several symptoms when the P2552 code is triggered:

• Unresponsive or delayed throttle response when accelerating
• Engine hesitations or stalling during operation
• Check Engine Light illuminated on the dashboard
• Decreased fuel efficiency due to improper fuel delivery
• Potential limp mode activated, limiting vehicle speed.

What causes the P2552 code?

The most common causes of the P2552 code include:

• Faulty throttle body or throttle position sensor (TPS)
• Wiring issues such as damaged or corroded connectors
• Malfunctioning Engine Control Module (ECM)
• Incorrectly set throttle position due to calibration issues
• Problems in the fuel delivery system that affect throttle response.

How to fix P2552?

To address the P2552 fault code, follow these steps:

1. Inspect and repair any damaged wiring or connectors related to the throttle/fuel inhibit circuit.
2. Test the throttle body and TPS for proper functionality, replacing any faulty components as needed.
3. Clear the fault codes and conduct a test drive to see if the issue reoccurs.
4. If the problem persists, consult a professional mechanic to perform further diagnostics on the ECM and throttle control system.
5. Regular maintenance, including cleaning the throttle body, can help prevent future issues.