The Check Engine Light may illuminate with code P0400 stored for an exhaust gas recirculation (EGR) fault. Our technicians tell us if no EGR system faults are noted, updated powertrain control module (PCM) is available which should correct this issue.
Check Engine Light With Code P0400 on Ford Fusion Hybrid
Average mileage: 58,403 (41,000–91,000)
1 model year affected: 2010
8 people reported this problem
4 people shared problem details
2010 Ford Fusion Hybrid60,500Visitor
"Service engine soon" light came on just prior to a routine oil/filter change...tech hooked up to the OBD-II, reported the code...quick lookup on the internet suggested this was likely a common issue, no other problems were evident, so I simply had the tech reset the computer. Will note the interval if it comes on again.
2010 Ford Fusion Hybrid58,000Visitor
PO400 code reset it and no problems - no change in MPG I average 41 highway
2010 Ford Fusion Hybrid42,000Visitor
I took the car to Pep Boys for a free check engine scan and they reported the problem as PO400. After the scan the light turned off on its own.
2010 Ford Fusion Hybrid53,121Visitor
Failed emission testing with a code of p0400.
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