Engine Rpm/Vehicle Speed Limiter
WARNING: This page is about a different car, the 2001 Mazda Tribute, 2001 Mazda B4000, 2001 Mazda B3000, 2001 Mazda B2500, and 2001 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
The Powertrain Control Module (PCM) will disable some or all fuel injectors whenever an engine RPM or vehicle overspeed condition is detected. The purpose of engine RPM/vehicle speed limiter is to prevent damage to vehicle powertrain. Vehicle will run rough, and PCM will store a continuous memory DTC P1270. When overspeed condition is over, engine will return to normal operation. If necessary, clear DTC P1270 from PCM.