Hello all I have a 2005 expl 4.0 sohc. It has code p0171 too lean bank 1 code p0175 too richbank 2 code p02198 sensor stuck rich bank 2 sensor 1. I have replaced intake gaskets and pcv valve. I cleared codes and they come back truck will barely run. I swapped both front o2 sensors and codes come back the same.I am a mechanic on school buses but this is kicking my butt any help is appreciated. I also cleaned mass air flow with brake cleaner.Anyone ever ran into this before?
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4.0 rich one bank lean on other
- Thread starter donald41
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its been a while. the coil pack is not original and is not marked. I have plug wires rear row near elecrical conn left to right 123 and front row radiator side left to right 564 cylinders.I know 123 are pass side and 456 drivers side. it doesnt have a dead miss.almost like late timing but scanner showes 25 degrees
i found my problem
the left cat converter is stopped up. I removed spark plugs left ones very smutted up and right ones good and clean. put them back and removed left front 02 sensor cranked truck it ran good. by having it out i was giving the exhaust a way out. put 02 back and it smothered down again. thanks
the left cat converter is stopped up. I removed spark plugs left ones very smutted up and right ones good and clean. put them back and removed left front 02 sensor cranked truck it ran good. by having it out i was giving the exhaust a way out. put 02 back and it smothered down again. thanks
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