Engine RPM/Vehicle Speed Limiter

The powertrain control module (PCM) disables some or all of the fuel injectors whenever an engine RPM or vehicle over-speed condition is detected. The purpose of the engine RPM or vehicle speed limiter is to prevent damage to the powertrain. The vehicle exhibits a rough running engine condition, and the PCM stores continuous diagnostic trouble code (DTC) P1270. Once the driver reduces the over-speed condition, the engine returns to the normal operating mode. No repair is required. However, the technician should clear the DTC and inform the customer of the reason for the DTC.

Excessive wheel slippage may be caused by sand, gravel, rain, mud, snow, ice, or excessive and sudden increase in RPM while in NEUTRAL or while driving.