LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Code 26 - Air/Fuel Rich Malfunction

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Old 03-04-18, 07:32 AM
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SuhDude
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Unhappy Code 26 - Air/Fuel Rich Malfunction

So my '91 LS had the error code 28 - Main oxygen sensor signal (on right bank), so I replaced the o2 sensor on the passenger side by the manifold. That code has since gone away but now after driving it I get codes
71 - EGR System Malfunction
and
26 - Air/Fuel Rich Malfunction,
The thing sucks gas like crazy. Any ideas on what to chase down to solve this? Runs great otherwise. The EGR wouldn't affect the AFR right?
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