What are the common causes of P2552?

An open or short in the throttle/fuel inhibit A circuit. A failed throttle position sensor. Corrosion at the throttle/fuel inhibit A connector. Low battery voltage weakening the circuit.

Read the throttle/fuel inhibit A circuit on a scan tool. Test the throttle/fuel inhibit A circuit for open and short faults. Check the throttle/fuel inhibit A connector for corrosion. Check the throttle position sensor signal. Check battery voltage and connections. Clear the code and retest.

P2552

Throttle/Fuel Inhibit A Circuit

System: Speed and idle control (P code)
Lamp: Check Engine Light
Category: Powertrain - Computer and Auxiliary Controls

What it means

P2552 means Throttle/Fuel Inhibit A Circuit.

Check these first

An open or short in the throttle/fuel inhibit A circuit
A failed throttle position sensor
Corrosion at the throttle/fuel inhibit A connector
Low battery voltage weakening the circuit

What to do next

Read the throttle/fuel inhibit A circuit on a scan tool
Test the throttle/fuel inhibit A circuit for open and short faults
Check the throttle/fuel inhibit A connector for corrosion
Check the throttle position sensor signal
Check battery voltage and connections
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.