Does anyone know how many o2 sensors are on a 96 Ranger?

Just changed MAF sensor, all o2 sensors, fuel filter, and egr valve on 96 Ranger V6 4.0L?

• I'm still getting Code p1131 every 25 miles. Whats the problem??

• Answer:

  The p1131 if I remember is a lean bank 1 issue. check for vaccum leaks, if it's the SOHC model (single overhead cam) they had issues with o-rings leaking causing a lean running condition espcially at cold start. But any of them can run bad if there is a air leak somewheres after the MAF sensor and the whole engine may be running lean but only bad enough to set the code on the one bank. Check for air leaks, espically if it's the OHV model at the upper intake gasket.. also look for a misfire... both used a single coil pack and would have probably set a misfire code if it was that so my thinking is, it's not that. but check for air leaks, go to autozone and rent a fuel pressure guage and check the fuel pressure (should be about 30 psi or above if I remember) and make sure you clear codes by disconnecting the battery for lean codes for about 10 minutes.. It erases all information it learned that way so it won't reuse the old info and cause you headaches.