Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2001 Mercury Sable, 2001 Mercury Mountaineer, 2001 Mercury Grand Marquis, 2001 Mercury Cougar, and 2001 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

Perform this test when instructed during QUICK TEST or if directed by other test procedures.

1) Continuous Memory DTC P1270: Excessive Engine RPM/Vehicle Speed

This DTC indicates that vehicle was operated in a manner which caused engine or vehicle speed to exceed a calibrated limit. Possible causes are:
- Wheel Slippage Caused By Mud, Ice, Water, Snow, Etc.
- Excessive Engine RPM In Neutral
- Vehicle Driven At Excessive Rate Of Speed
If any of the specified causes have occurred, system is okay. Clear PCM memory. Ensure vehicle owner has an understanding of what causes DTC P1270 to set. If none of specified causes have occurred, clear PCM memory. Check for other driveability problems. See SYMPTOMS under TROUBLE SHOOTING - NO CODES - EEC-V - CNG & GASOLINE article. Repair as necessary. If no other problems are present, return vehicle to customer.