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I have 2 fault codes, P2196 & P2198, truck running really rich, code descriptions are lack of heated oxygen sensor, bank 1 sensor1 and bank 2 sensor 1. Which oxygen sensors could be faulty?
Vehicle: 2008 ford f-150 4.6L

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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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