Powertrain, generic · Fuel and air metering (injector circuit)
P02EC Diesel Intake Air Flow A Control System - High Air Flow Detected
Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo
Ford's 6.7 and 3.0 diesels control the air mass through the EGR valve and the intake throttle. P02EC means the measured air mass stays above target with the control at its limit – too little EGR, or the throttle cannot restrict enough – for 10 s (6.7) or 5 s (3.0). Typical causes are a stuck-closed EGR valve or clogged EGR cooler, a throttle stuck open or a mass airflow sensor reading too high. NOx rises; driving is usually unaffected. Other manufacturers using this code were not found.
Likely causes
EGR valve stuck closed or EGR cooler clogged
Intake throttle stuck open (P02E4)
Mass airflow sensor reading too high
Boost too high
Symptoms
- Check engine light on
- Higher NOx
- Often no change in driving
Repair estimate
DifficultyHardWorkshop job
Parts and labour€100–1,500
Time1–5 h
Typical range across vehicles; the real cost depends on what the testing finds.
Parts involved
egr valvediesel intake throttle valvemass air flow sensor
Related codes
References: law.cornell.edu, fordservicecontent.com, ms-motorservice.com.