jt351

Next step is to find out if bank 2 is actually rich. If bank2 is rich than the spark plugs on drivers side will be darker or black compared to passenger side. Now if you check the plugs and the the drivers side is snow white than we know that the code is a false signal and you could have a bad o2 sensor or the wires are covered in oil or getting a crossover voltage from from the heater wires. also a free diagnostic is to swap the upstream o2 sensors and if the other bank is rich than you know you have a bad 02 sensor.

motoxron

I replaced the plugs last weekend but i will check them tomorrow and see what they look like. I think theywere dark when i pulled them. I will also swap the o2 sensors. Upstream id closest to the motor right?
And thanks for helping me w this and posting back

motoxron

Oh and how do i check to see about crossover voltage and what wires could b covered in oil?

papa tiger

Take your PCV system completely off and fix it.

motoxron

The pcv has been taken off and cleaned and it still throws a code.

papa tiger

Your looking for a vacuum leak in the PCV elbow or hose, system is injecting more fuel to make up for difference from maf probably on that bank it hooks to. If that hose is ok and elbow, look for another vacuum leak. Hold a propane torch turned on some, torch unlit, engine will perk up if you find a vacuum leak.

motoxron

The pcv hose was changed about 2 weeks ago. The old one was spongy so i thought that was the problem

papa tiger

OK look to the "DPFE back by the EGR there are 2 vacuum hoses this does the evap to the fuel tank. This is a complicated portion of the emissions control and covers the EGR, Evap, o2, and NO2 emissions. We may be looking for a plugged, crimped vacuum hose also. Check our http://www.ehow.com/how-12156376_200...code-1401.html the code is different but the tests are the same.

motoxron

I also tryd the carb cleaner trick on all the vac lines and nothing w the idle changed. The propane would be the same ?

motoxron

I will check the DPFE tomorrow. I was gonna check it but totally forgot about it. Whats the best way to test it? Ohm meter?