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O2 sensor heater circuit malfunction, 95 OHV 4.0


tahiti429

Member
Joined
Dec 19, 2010
Messages
14
Vehicle Year
1989 1993
Transmission
Automatic
Hey guys, I am having a problem with the O2 sensors on my 95 Ranger with a OHV 4.0 with a manual transmission. The CEL has been coming on and i keep getting the codes P1443, P0135, and P0155. The codes are O2 sensor malfunction bank 1, 2 and manufacturer emission control malfunction. I have replaced both O2 sensors cleared the codes and the CEL keeps coming on. I have checked both harnesses and plugs for damage and everything looks fine. I am about to pull my hair out! Any help or suggestions would be much appreciated.
 
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