Frequent Stalling During Engine Warm-Up

SYMPTOM: Frequent stalling while warming up

CHECK:
1. Electronic Air Control Valve (14)
2. EGR Control System (12)
3. Coolant temperature Sensor (6)
4. Electronic Control Unit *

Numbers in parentheses are the blink codes displayed on the back of the ECU.

* LED on the ECU is not on, or stays on without blinking.