The famous p0471 code again. Rough idle trouble code p0402 P0471 – exhaust gas pressure sensor -range/performance problem
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Rough Idle Trouble CODE P0402 - Ford F150 Forum - Community of Ford
P0471 – Exhaust gas pressure sensor -range/performance problem
The famous P0471 code again. - JeepForum.com
16 powerSTROKE - MIL P0471 O.D. - YouTube