DTC P1281: Engine Is Cold Too Long: Testing

WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: This test works best if performed on a cold engine (cold soak). Extremely cold outside ambient temperatures may cause this DTC to set. Verify that the coolant level is correct. If not, repair as necessary. Ensure the Engine Coolant Temperature (ECT) sensor is operating correctly.

Start the engine. With the DRBIII(R) scan tool, set engine speed to 1500 RPM and allow engine to warm up for 10-15 minutes. With the DRBIII(R) scan tool, monitor the Eng Coolant Tmp Deg value during the warm-up cycle. Ensure the transition of the temperature change is smooth. Did the engine temperature reach a minimum of 176°F (80°C)? If yes, test is complete. If no, repair cooling system as necessary. The most probable cause is a thermostat problem. Also, check for any related Technical Service Bulletin (TSB) that may apply.