DTC P0125: Excessive Time To Enter Closed Loop: Condition

DTC is set when engine coolant temperature has not increased after engine is started and default period of time has passed. Possible causes for this fault are:

• Insufficient engine warm-up time.
• Thermostat leaking or stuck open.
• Low coolant. Repair cooling system as necessary. Clear PCM memory, and repeat QUICK TEST. See SELF-DIAGNOSTICS - INTRODUCTION - 626 article.