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Part 1 -how to test: p0117 obd ii trouble code (ford 4.0l)Ford code po420 engine p0420 ranger 1996 location source mean does P0420 code fault bank sensor diagnose lightCode fault present ford.
Eobd p0420: what does it mean & what to do when it appears?Diagnose a p0420 fault code with explination bank 1 o2 sensor fault .
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