The P2555 code indicates a high voltage condition in the throttle actuator control circuit, meaning the PCM detected excessive voltage on the throttle control circuit.
The valve may short internally, causing the circuit voltage to rise above normal levels.
A chafed or damaged wire can connect the circuit to a constant 12‑V source, raising voltage readings.
Corrosion or loose pins can create resistance changes that the PCM interprets as high voltage.
A defective pedal sensor can send abnormal signals that keep the throttle circuit energized.
An internal PCM fault can cause the driver circuit to output excessive voltage, but this is uncommon.
No. The code most often results from a faulty throttle actuator valve, wiring short, or connector problem; PCM failure is rare.
Yes, if the issue is a short or corroded wire, repairing the circuit can resolve the code without replacing any components.
If the underlying fault is not repaired, the code will return and the engine may again enter limp‑mode with reduced power.
The valve is typically replaced as a unit; internal short circuits are not serviceable.