Hi there,
Bank 1 and bank 2 front O2 sensors could be the problem, but since the issue is affecting both sides of the engine it's not likely an O2 sensor problem. Here is a list of other possible causes.
P2198 FORD - Oxygen Sensor Signal Biased/Stuck Rich Bank 2 Sensor 1 Read more: https://www.autocodes.com/p2198_ford.html
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