Engine RPM/Vehicle Speed Limiter

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2003 Mercury Sable, 2003 Mercury Mountaineer, 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

PCM will disable some or all fuel injectors whenever an engine RPM or vehicle overspeed condition is detected. This prevents damage to the powertrain. Excessive wheel slippage caused by sand, gravel, rain, mud, snow, ice, etc. or excessive and sudden increase in RPM while in NEUTRAL or while driving may cause engine RPM/vehicle speed limiter to be enabled. When engine RPM/vehicle speed limiter has been enabled, vehicle will exhibit a rough running engine condition, and PCM will store DTC P1270. After driver reduces excessive speed, engine will return to normal operating mode. No repairs are required. Technician should clear DTC from PCM and inform customer of the reason for DTC. Excessive wheel slippage may be caused by sand, gravel, rain, mud, snow, ice, etc. or excessive and sudden increase in RPM while in Neutral or while driving.