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.Google+
Car Problem Reports
Ford Fusion Hybrid Check Engine Light With Code P0400
Ford Fusion Hybrid Problem
Model Year Affected: 2010
Average Mileage: 61,405 mi (41,000 mi - 91,000 mi)
Visitor, 2010 Ford Fusion Hybrid, 60,500 mi
"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.
Visitor, 2010 Ford Fusion Hybrid, 53,121 mi
Failed emission testing with a code of p0400.